Short-term high- vs low-velocity isokinetic lengthening training results in greater hypertrophy of the elbow flexors in young men

• Published in: Scandinavian journal of medicine & science in sports 2005-04, Vol.15 (2), p.135-136
• Main Authors: Shepstone, T. N., Tang, J. E., Dallaire, S. E., Schuenke, M. D., Staron, R. S., Phillips, S. M.
• Format: Article
• Language: English
• ISSN: 0905-7188; 1600-0838
• DOI: 10.1111/j.1600-0838.2005.453_1.x

Study I – The effect of fast (3.66 rad/s, FAST) or slow (0.35 rad/s, SLOW) isokinetic high‐resistance muscle lengthening contractions on muscle fiber and whole muscle cross‐sectional area (CSA) of the elbow flexors was investigated in young men. Twelve subjects (23.8±2.4 years, mean±SD) performed maximal resistive lengthening isokinetic exercise with both arms for 8 weeks (3 days/week), during which they trained one arm at a FAST velocity while the contralateral arm performed an equivalent number of contractions at a SLOW velocity. Before (PRE) and after (POST) the training, percutaneous muscle biopsies were taken from the mid‐belly of the biceps brachii and analyzed for fiber type and CSA. Type I muscle fiber size increased PRE to POST (P