What? Are you serious? Sure it didn't improve performance in even younger (10-years-olds) ...
Yes.
NR did not improve V02max in the young (22.9 years old) or the old (71.5 years old). NR improved isometric peak torque and fatigue only in the 70-year-olds.
"NR supplementation did not affect VO2max and concentric peak torque, but improved isometric peak torque by 8% (P = 0.048) and the fatigue index by 15% (P = 0.012) in the old. In contrast, NR supplementation did not exert any redox or physiological effect in the young."
https://sci-hub.tw/h...394-019-01919-4
Edited by Fredrik, 07 February 2019 - 12:53 PM.