. 2019 Apr 18;8(5):422–441. doi: 10.1016/j.jshs.2019.04.002

Table 1.

Classification of exercise intensity.

Intensity	%HRR or %VO_2peak	%HR_max	%VO_2max	RPE	%1-RM
Low intensity	<30	<57	<37	<9	<30
Low intensity	30–39	57–63	37–45	9–10	30–49
Moderate intensity	40–59	64–76	46–63	11–13	50–69
High intensity	60–89	77–95	64–90	14–17	70–84
High intensity	≥90	≥96	≥91	≥18	≥85

Note: Table adapted from Garber CE, et al.¹⁰

Abbreviations: 1-RM = one-repetition maximum; HRR = heart rate reserve; HR_max = maximum heart rate; RPE = rating of perceived exertion; VO_2max = maximum oxygen uptake; VO_2peak = peak oxygen uptake.