Inspiratory muscle fatigue affects latissimus dorsi but not pectoralis major activity during arms only front crawl sprinting.

The purpose of this study was to determine whether inspiratory muscle fatigue (IMF) affects the muscle activity of the latissimus dorsi and pectoralis major during maximal arms only front crawl swimming. Eight collegiate swimmers were recruited to perform 2 maximal 20-second arms only front crawl sprints in a swimming flume. Both sprints were performed on the same day, and IMF was induced 30 minutes after the first (control) sprint.

Effects of creatine on body composition and strength gains after 4 weeks of resistance training in previously nonresistance-trained humans.

This study examined the effects of Cr supplementation on muscle strength in conjunction with resistance training in nonresistance-trained males utilizing strategies previously reported in the literature to help optimize muscle CR uptake. Nineteen nonresistance-trained males underwent 4 weeks of resistance training (3 days x week(-1)) while assigned to Cr (20 g x d(-1) Cr + 140 g x d(-1) glucose) for 7 days (loading), followed by 5 g x d(-1) Cr + 35 g x d(-1) glucose for 21 days (maintenance; n = 9) or placebo (160 g x d(-1) glucose [loading] followed by 40 g x d(-1) [maintenance; n = 10]). In subjects classified as "responders" to Cr on the basis of body mass changes (n = 7), the magnitude of change in 180 degrees x s(-1) isokinetic (p = .