A study in the European Journal of Applied Physiology found that spirulina supplementation improved aerobic exercise performance by extending the duration of exercise. (onnit.com)
A study published in Medicine and Science in Sports and Exercise examined the effects of spirulina supplementation on subjects during an exhaustive cardiovascular exercise session. (mindandmuscle.net)
Another study in college athletes found that spirulina supplementation increased muscle strength, but did not have any effect on endurance (30). (healthline.com)