Birjand University Of Medical Sciences

This trial tests whether taking caffeine daily for a week can improve upper-body anaerobic power—the kind of explosive strength used in short, intense efforts—in healthy active women aged 25 to 30. Participants receive either caffeine (5 mg per kg of body weight) or a placebo cap…

Researchers compare how a single dose and a 7-day course of caffeine affect strength and power in women who already consume caffeine daily. Thirty-six resistance-trained women receive 3 mg/kg caffeine, 6 mg/kg caffeine, or a placebo in a double-blind crossover design. The study m…

This trial tests three resistance training methods—traditional, standard cluster, and undulating cluster—in female volleyball players aged 18-30. Over eight weeks, participants train three times weekly, with blood samples and performance tests measuring strength, hormones, and in…

This study looked at whether doing leg exercises like jumps can also improve upper-body strength and muscle size in teenage male basketball players. Fifty players aged 16-18 with at least 2 years of experience were split into groups doing either combined leg-and-arm plyometrics, …