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Piedrahita, Hugo
Publications (10 of 21) Show all publications
Piedrahita, H., Oksa, J., Rintamäki, H. & Malm, C. (2009). Effect of local leg cooling on upper limb trajectories and muscle function and whole body dynamic balance (ed.). European Journal of Applied Physiology, 105(3), 429-438
Open this publication in new window or tab >>Effect of local leg cooling on upper limb trajectories and muscle function and whole body dynamic balance
2009 (English)In: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327, Vol. 105, no 3, p. 429-438Article in journal (Refereed) Published
Abstract [en]

This study was designed to find out if local leg cooling affects muscle function and trajectories of the upper limb during repetitive light work as well as capability to maintain dynamic balance. Nine healthy female subjects performed repetitive lifting task with right hand for 60 min while standing in front of a table with six target angles (30°-220°) and with the legs inside a container with 15°C cold water (Cold condition, C) or without water (Normal condition, N). Muscle temperature of the medial aspect of the gastrocnemius, rectal, and skin temperatures were measured continuously. The trajectories of the right upper limb were recorded with a 3D motion analysis system. Muscular strain (averaged EMG, a-EMG) and EMG gaps in eight muscles of the right upper limb were measured. End point excursion depicting the ability to maintain dynamic balance was measured before and after each experiment. Leg cooling decreased significantly (P < 0.05) the muscle and the mean skin temperature in C compared with N (6.7 and 2.2°C, respectively). No marked changes in the trajectories or EMG activity were observed between the different environmental conditions. The end point excursion was significantly (P < 0.05) reduced in C compared with N and a positive correlation between excursion and muscle temperature was found at the end of the working period in C. In conclusion, local leg cooling did not affect upper limb muscle function or trajectories, but ability to maintain dynamic balance was reduced.

National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Industrial Work Environment
Identifiers
urn:nbn:se:ltu:diva-5724 (URN)10.1007/s00421-008-0920-6 (DOI)000262650500013 ()19002706 (PubMedID)2-s2.0-59249105530 (Scopus ID)3e6ae310-0539-11dd-b034-000ea68e967b (Local ID)3e6ae310-0539-11dd-b034-000ea68e967b (Archive number)3e6ae310-0539-11dd-b034-000ea68e967b (OAI)
Note

Validerad; 2009; 20080408 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Piedrahita, H., Oksa, J., Rintamäki, J. & Malm, C. (2009). Local leg cooling and its effects on upper limb muscle function and whole body balance (ed.). In: (Ed.), International Congress on Occupational Health, ICOH: . Paper presented at ICOH International Congress on Occupational Health : 22/03/2009 - 27/03/2009.
Open this publication in new window or tab >>Local leg cooling and its effects on upper limb muscle function and whole body balance
2009 (English)In: International Congress on Occupational Health, ICOH, 2009Conference paper (Other academic)
National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Industrial Work Environment
Identifiers
urn:nbn:se:ltu:diva-34620 (URN)8dc620a0-227a-11de-9f8a-000ea68e967b (Local ID)8dc620a0-227a-11de-9f8a-000ea68e967b (Archive number)8dc620a0-227a-11de-9f8a-000ea68e967b (OAI)
Conference
ICOH International Congress on Occupational Health : 22/03/2009 - 27/03/2009
Note

Godkänd; 2009; 20090406 (biem)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-03-07Bibliographically approved
Piedrahita, H., Oksa, J., Rintamäki, H. & Malm, C. (2009). Working in extreme cold conditions indoors (ed.). In: (Ed.), International Congress on Occupational Health, ICOH: . Paper presented at ICOH International Congress on Occupational Health : 22/03/2009 - 27/03/2009.
Open this publication in new window or tab >>Working in extreme cold conditions indoors
2009 (English)In: International Congress on Occupational Health, ICOH, 2009Conference paper (Other academic)
National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Industrial Work Environment
Identifiers
urn:nbn:se:ltu:diva-37543 (URN)b9baae20-2279-11de-9f8a-000ea68e967b (Local ID)b9baae20-2279-11de-9f8a-000ea68e967b (Archive number)b9baae20-2279-11de-9f8a-000ea68e967b (OAI)
Conference
ICOH International Congress on Occupational Health : 22/03/2009 - 27/03/2009
Note

Godkänd; 2009; 20090406 (biem)

Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2018-03-07Bibliographically approved
Piedrahita, H., Oksa, J., Malm, C., Sormunen, E. & Rintamäki, H. (2008). Effects of cooling and clothing on vertical trajectories of the upper arm and muscle functions during repetitive light work (ed.). European Journal of Applied Physiology, 104(2), 183-191
Open this publication in new window or tab >>Effects of cooling and clothing on vertical trajectories of the upper arm and muscle functions during repetitive light work
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2008 (English)In: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327, Vol. 104, no 2, p. 183-191Article in journal (Refereed) Published
Abstract [en]

The present study was designed to find out if cooling and/or clothing affect the vertical trajectories and muscle function of the upper arm during repetitive light work. Twelve female subjects performed a one-handed lifting task for 60 min while standing in front of a table with six target angles (30 degrees to 220 degrees ). The experiment was carried out in a climatic chamber in three different conditions: at 10 degrees C (C), at 25 degrees C (TN), and at 10 degrees C dressed in cold-protective clothing (C(p)). Skin and rectal temperatures were measured continuously. The vertical trajectories of the head, shoulder, elbow, and wrist on the right side of the body were recorded. Muscular strain (averaged EMG, a-EMG) and EMG gaps in eight muscles on the right upper arm were measured. The variation of the vertical trajectory amplitude of the upper arm measured from the elbow was significantly higher (at 200 degrees ) both at C and C(p) (50 and 25% respectively) and in shoulder (at 220 degrees angle) at C (33%) compared with TN (P < 0.05). Both C and C(p) increased a-EMG and reduced the number and duration of EMG gaps significantly in all muscles studied. In conclusion, in repetitive tasks the high mean vertical trajectory and changes in the amplitude of the trajectory of the upper arm at C and C(p) compared with TN were associated with increased muscular strain and reduced number of EMG gaps (more continuous activation of given muscle fibers). The changes in trajectories may serve as indicator of a risk for local muscle fatigue

National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Industrial Work Environment
Identifiers
urn:nbn:se:ltu:diva-8519 (URN)10.1007/s00421-007-0657-7 (DOI)000258609300007 ()2-s2.0-50449105430 (Scopus ID)7081fd20-3d2e-11dd-ab50-000ea68e967b (Local ID)7081fd20-3d2e-11dd-ab50-000ea68e967b (Archive number)7081fd20-3d2e-11dd-ab50-000ea68e967b (OAI)
Note

Validerad; 2008; 20080618 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Piedrahita, H., Oksa, J., Malm, C. & Rintamäki, H. (2008). Health problems related to working in extreme cold conditions indoors (ed.). International Journal of Circumpolar Health, 67(2/3), 279-287
Open this publication in new window or tab >>Health problems related to working in extreme cold conditions indoors
2008 (English)In: International Journal of Circumpolar Health, ISSN 1239-9736, E-ISSN 2242-3982, Vol. 67, no 2/3, p. 279-287Article in journal (Refereed) Published
Abstract [en]

To identify health problems among workers performing cleaning, maintenance and machine operation tasks inside cold storage rooms with temperatures between -43 degrees C and -62 degrees C in a freeze drying coffee company. STUDY DESIGN: Descriptive study. METHODS: All 24 workers working inside the cold stores participated in the study. A questionnaire about cold-related health problems and the standardized Nordic questionnaire assessing muscle complaints were completed by all exposed workers. A physical examination was performed on each worker. RESULTS: The most relevant cold-related health problem was episodic finger symptoms (50%), followed by respiratory symptoms (21%), peripheral circulation symptoms (20%), and repeated pain in the musculoskeletal system (12%). Two subjects had a previous diagnosis of Raynaud's phenomenon (RP). The prevalence of musculoskeletal complains in the neck and low back was 21% in each. CONCLUSIONS: The prevalence found for various complaints among the freeze drying coffee workers implies that the cold conditions inside cold stores may present a real risk of cold-related health problems and, due to lowered concentration level, for injuries, too. Greater efforts should be made to minimize the cold exposure by designing automation processes to prevent continuous exposure to cold during freeze drying process. In addition, improving the cold-protective clothing and guaranteeing its appropriate use will reduce health risks.

National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Industrial Work Environment
Identifiers
urn:nbn:se:ltu:diva-4645 (URN)29f71190-053b-11dd-b034-000ea68e967b (Local ID)29f71190-053b-11dd-b034-000ea68e967b (Archive number)29f71190-053b-11dd-b034-000ea68e967b (OAI)
Note

Validerad; 2008; 20080408 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-03-07Bibliographically approved
Piedrahita, H. (2008). Working in cold conditions indoors: effects on musculoskeletal symptoms and upper limb movements (ed.). (Doctoral dissertation). Paper presented at . Luleå: Luleå tekniska universitet
Open this publication in new window or tab >>Working in cold conditions indoors: effects on musculoskeletal symptoms and upper limb movements
2008 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis evaluated the general and local effect of cooling on upper arm movements and muscle function in its relation with musculoskeletal symptoms and complains in working populations. Two experiments were performed in laboratory conditions testing women such a subject. Epidemiology approach was used for evaluate the cold effect on musculoskeletal system in working populations exposed to cold. The results showed that general cooling affected upper arm trajectories due to changes in muscle function parameters. Local leg cooling did not affect upper arm muscle function or trajectories but ability to maintain dynamic balance was reduced.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2008. p. 64
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544 ; 2008:16
National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Industrial Work Environment
Identifiers
urn:nbn:se:ltu:diva-26320 (URN)db2a25a0-ffdd-11dc-8441-000ea68e967b (Local ID)db2a25a0-ffdd-11dc-8441-000ea68e967b (Archive number)db2a25a0-ffdd-11dc-8441-000ea68e967b (OAI)
Note

Godkänd; 2008; 20080401 (ysko)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-03-07Bibliographically approved
Piedrahita, H. (2007). Cost estimation of work-related musculoskeletal disorders (MSDs) in developing countries (ed.). In: (Ed.), Sixth International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders (PREMUS 2007), Boston, Massachusetts (USA), 27-30 Aug 2007: . Paper presented at International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders : 27/08/2007 - 30/08/2007.
Open this publication in new window or tab >>Cost estimation of work-related musculoskeletal disorders (MSDs) in developing countries
2007 (English)In: Sixth International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders (PREMUS 2007), Boston, Massachusetts (USA), 27-30 Aug 2007, 2007Conference paper, Published paper (Refereed)
National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Industrial Work Environment
Identifiers
urn:nbn:se:ltu:diva-35496 (URN)a0b69490-862e-11dc-a4a5-000ea68e967b (Local ID)a0b69490-862e-11dc-a4a5-000ea68e967b (Archive number)a0b69490-862e-11dc-a4a5-000ea68e967b (OAI)
Conference
International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders : 27/08/2007 - 30/08/2007
Note

Godkänd; 2007; 20071029 (biem)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-03-07Bibliographically approved
Piedrahita, H. (2007). Desórdenes músculo-esqueléticos y exposición ocupacional a frío: buscando una asociación (ed.). In: (Ed.), : . Paper presented at Conference of the Latin-American Union of Ergonomics Societies (ULAERGO) : 16/10/2007 - 19/10/2007.
Open this publication in new window or tab >>Desórdenes músculo-esqueléticos y exposición ocupacional a frío: buscando una asociación
2007 (Spanish)Conference paper, Oral presentation only (Refereed)
National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Industrial Work Environment
Identifiers
urn:nbn:se:ltu:diva-34854 (URN)92905670-862f-11dc-a4a5-000ea68e967b (Local ID)92905670-862f-11dc-a4a5-000ea68e967b (Archive number)92905670-862f-11dc-a4a5-000ea68e967b (OAI)
Conference
Conference of the Latin-American Union of Ergonomics Societies (ULAERGO) : 16/10/2007 - 19/10/2007
Note

Godkänd; 2007; 20110907 (ysko)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-03-07Bibliographically approved
Piedrahita, H., Oksa, J., Rintamaki, H., Sormunen, E. & Malm, C. (2007). Effect of cooling on upper arm movements during a repetitive task (ed.). In: (Ed.), 12th International Conference on Environmental Ergonomics: . Paper presented at International Conference on Environmental Ergonomics : 19/08/2007 - 24/08/2007.
Open this publication in new window or tab >>Effect of cooling on upper arm movements during a repetitive task
Show others...
2007 (English)In: 12th International Conference on Environmental Ergonomics, 2007Conference paper, Published paper (Refereed)
National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Industrial Work Environment
Identifiers
urn:nbn:se:ltu:diva-30752 (URN)4aba47b0-862b-11dc-a4a5-000ea68e967b (Local ID)4aba47b0-862b-11dc-a4a5-000ea68e967b (Archive number)4aba47b0-862b-11dc-a4a5-000ea68e967b (OAI)
Conference
International Conference on Environmental Ergonomics : 19/08/2007 - 24/08/2007
Note

Godkänd; 2007; 20071029 (biem)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-03-07Bibliographically approved
Piedrahita, H. (2007). Nuevas tendencias de investigación en los trastornos músculo-esqueléticos (TMEs) (ed.). In: (Ed.), IX Congreso Internacional de Ergonomía - XIII Reunión Binacional de Ergonomía México - Estados Unido: . Paper presented at Congreso Internacional de Ergonomía / XIII Reunión Binacional de Ergonomía México - Estados Unido : 25/04/2007 - 28/04/2007.
Open this publication in new window or tab >>Nuevas tendencias de investigación en los trastornos músculo-esqueléticos (TMEs)
2007 (Spanish)In: IX Congreso Internacional de Ergonomía - XIII Reunión Binacional de Ergonomía México - Estados Unido, 2007Conference paper, Published paper (Refereed)
National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Industrial Work Environment
Identifiers
urn:nbn:se:ltu:diva-39086 (URN)db1fb1d0-862d-11dc-a4a5-000ea68e967b (Local ID)db1fb1d0-862d-11dc-a4a5-000ea68e967b (Archive number)db1fb1d0-862d-11dc-a4a5-000ea68e967b (OAI)
Conference
Congreso Internacional de Ergonomía / XIII Reunión Binacional de Ergonomía México - Estados Unido : 25/04/2007 - 28/04/2007
Note

Godkänd; 2007; 20071029 (biem)

Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2018-03-07Bibliographically approved

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