Keys Fitness 920U Target Heart Rate Zone, MHR = Maximum Heart Rate THR = Target Heart Rate

Check your pulse recovery rate – If your pulse is over 100 bpm five minutes after you stop exercising, or if it’s higher than normal the morning after exercising, your exertion may have been too strenuous for your current fitness level. Rest and reduce the intensity next time.

Fitness Safety The target heart rate chart indicates aver- age rate zones for different ages. A variety of different factors (including medication, emotional state, temperature and other conditions) can affect the target heart rate zone that is best for you. Your physician or health care professional can help you determine the exercise intensity that is appropriate for your age and condition.

(MHR) = Maximum Heart Rate

(THR) = Target Heart Rate

220 - age = maximum heart rate (MHR).

MHR x .60 = 60% of your maximum heart rate.

MHR x .75 = 75% of your maximum heart rate.

For example, if you are 30 years old, your calculations will be as follows:

220 - 30 = 190

190 x .60 = 114 (low end or 60% of MHR)

190 x .75 = 142 (high end or 75% of MHR)

30 year-old (THR) Target Heart Rate would be 114-142.

See Table on right for additional calculations.

TARGET HEART RATE ZONE

100%	200
		195	190
					185
						180
							175
Serious								170
									165
athletic
										160
training range
											155
85%	170	166		162
					157
						153
Cardiovascular							149
								145
conditioning									140
range										136	132
75%	150	146		143	139
						135
							131	128
Fat burning									124
										120
range											116
60%	120	117		114	111	108
							105
								102
									99
										96
											93

20 25 30 35 40 45 50 55 60 65

AGE

20 21