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  • 1.
    Berglund, Lars
    et al.
    Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University.
    Aasa, Björn
    Norrlandsklinikens hälsocentral, Umeå.
    Hellqvist, Jonas
    Michaelson, Peter
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Hälsa och rehabilitering.
    Aasa, Ulrika
    Department of Community Medicine and Rehabilitation, Umeå University.
    Which patients with low back pain benefit from deadlift training?2015Inngår i: Journal of Strength and Conditioning Research, ISSN 1064-8011, E-ISSN 1533-4287, Vol. 29, nr 7, s. 1803-1811Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Recent studies have indicated that the deadlift exercise may be effective in decreasing pain intensity and increasing activity for most, but not all, patients with a dominating mechanical low back pain pattern. This study aimed to evaluate which individual factors measured at baseline could predict activity, disability, and pain intensity in patients with mechanical low back pain after an 8-week training period involving the deadlift as a rehabilitative exercise. Thirty-five participants performed deadlift training under the supervision of a physical therapist with powerlifting experience. Measures of pain-related fear of movement, hip and trunk muscle endurance and lumbopelvic movement control were collected at baseline. Measures of activity, disability and pain intensity were collected at baseline and at follow-up. Linear regression analyses were used to create models to predict activity, disability and pain intensity at follow-up. Results showed that participants with less disability, less pain intensity and higher performance on the Biering-Sørensen test, which tests the endurance of hip and back extensor muscles, at baseline benefit from deadlift training. The Biering-Sørensen test was the strongest predictor since it was included in all predictive models. Pain intensity was the next best predictor as it was included in two predictive models. Thus, for strength and conditioning professionals who use the deadlift as a rehabilitative exercise for individuals with mechanical low back pain, it is important to ensure that clients have sufficient back extensor strength and endurance and a sufficiently low pain intensity level to benefit from training involving the deadlift exercise.

  • 2.
    Nordström, Anna
    et al.
    Department of Surgical and Perioperative Science, Sports Medicine, Umea University.
    Högström, Gabriel
    Department of Surgical and Perioperative Science, Sports Medicine, Umea University.
    Eriksson, Anders
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Medicinsk vetenskap.
    Bonnerud, Patrik
    Luleå tekniska universitet.
    Tegner, Yelverton
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Medicinsk vetenskap.
    Malm, Christer
    Winternet.
    Higher muscle mass but lower gynoid fat mass in athletes using anabolic androgenic steroids2012Inngår i: Journal of Strength and Conditioning Research, ISSN 1064-8011, E-ISSN 1533-4287, Vol. 26, nr 1, s. 246-50Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Higher muscle mass but lower gynoid fat mass in athletes using anabolic androgenic steroids. J Strength Cond Res 26(1): 246-250, 2012-This study evaluated the relationship between anabolic androgenic steroid (AAS) use and body constitution. Dual-energy x-ray absorptiometry was used to measure bone mineral density (BMD, g.cm) of the total body, arms, and legs. Total gynoid and android fat mass (grams) and total lean mass (grams) were measured in 10 strength trained athletes (41.4 +/- 7.9 years) who had used AASs for 5-15 years (Doped) and 7 strength trained athletes (29.4 +/- 6.2 years) who had never used AASs (Clean).Seventeen sedentary men (30.3 +/- 2.1 years) served as Controls. Doped athletes had significantly more lean body mass (85.5 +/- 3.8 vs. 75.3 +/- 2.5 vs. 60.7 +/- 1.9, p < 0.001) and a greater index of fat-free/fat mass (5.8 vs. 2.6 vs. 2.5, p < 0.001) compared with Clean athletes and Controls. Doped athletes also had significantly less gynoid fat mass compared with that of Clean athletes (2.8 +/- 0.4 vs. 4.8 +/- 0.2 kg, p = 0.02). There were no differences in BMD between the athletes (p = 0.39-0.98), but both groups had significantly higher BMDs at all sites compared with that of Controls (p = 0.01 to <0.001). Thus, long-term AAS use seems to alter body constitution, favoring higher muscle mass and reduced gynoid fat mass without affecting BMD.

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