Figure 3. Growth hormone response to machine and free weight training regimens (±SE). (*) - denotes significant change from PRE to POST.

From

Acute Hormonal Responses to Free Weight and Machine Resistance Exercise

Andrew C. Fry, Justin X. Nicoll, Dimitrije Cabarkapa, Paige N. Stephens

American Journal of Sports Science and Medicine. 2022, 10(1), 6-11 doi:10.12691/ajssm-10-1-2