From: Effects of ingesting a pre-workout dietary supplement with and without synephrine for 8 weeks on training adaptations in resistance-trained males
Variable
Group
Number
Total Volume
p-value
Upper body (kg)
PLA
25
279,831 ± 132,101
0.33
PWS
27
236,691 ± 87,062
PWS + S
23
269,928 ± 103,130
Lower body (kg)
314,516 ± 136,966
0.66
283,825 ± 100,541
305,906 ± 133,611