The Practicalities Of Setting Target Heart Rates

From ETT results, the HRpeak can be used in either the %HRpeak or %HRRpeak (Karvonen HR reserve method) formulas. If a true maximal HR has been attained, then the annotation would be %HRmax or %HRRmax, respectively. When using the age-estimated maximal HR formula of 220 minus age (years) or the formula recommended by Tanaka, et al. (2001) of 208 minus (age years x 0.7), then the convention is to use %HRmax.

Table 3.2 provides a quick calculation for determining a target heart rate for a given %HRmax or %HRpeak, determined either from an age-estimation or an exercise test, respectively. Table 3.3 does the same, but for a patient on beta-blocking medication, where sub-maximal and peak exercising HR is reduced by between 20 and 40 beats per minute (Davies and Sargeant, 1979; Eston and Connelly, 1996; Liu, et al., 2000).

The Karovonen heart rate reserve method for determining a target HR, which can be used from either an exercise test peak HR (HRpeak), a maximal HR (HRmax), or from the age estimated HRmax formulas above, is as follows:

Target heart rate = %target x (HRpeak/max - HRrest) + HRrest %target = the desired percentage (e.g. 65%) of maximum at which the patient will exercise HRrest = the patient's resting heart rate

Table 3.4 provides a quick calculation of the %HRmax or peak.

Table 3.2. Target heart rate determination s?

Os O

For %HRmax calculation from age-estimated maximum (220 - age) or from %HRpeak taken from an exercise test

(years) 205 200 195 190 185 180 175 170 165 160 155 150 145 140 135 HRpeak

Heart rate

40

20%

20%

21%

21%

22%

22%

23%

24%

24%

25%

26%

27%

28%

29%

30%

45

20%

23%

23%

24%

24%

25%

26%

26%

27%

28%

29%

30%

31%

32%

33%

50

23%

25%

26%

26%

27%

28%

29%

29%

30%

31%

32%

33%

34%

36%

37%

55

25%

28%

28%

29%

30%

31%

31%

32%

33%

34%

35%

37%

38%

39%

41%

60

27%

30%

31%

32%

32%

33%

34%

35%

36%

38%

39%

40%

41%

43%

44%

65

30%

33%

33%

34%

35%

36%

37%

38%

39%

41%

42%

43%

45%

46%

48%

70

32%

35%

36%

37%

38%

39%

40%

41%

42%

44%

45%

47%

48%

50%

52%

75

34%

38%

38%

39%

41%

42%

43%

44%

45%

47%

48%

50%

52%

54%

56%

80

36%

40%

41%

42%

43%

44%

46%

47%

48%

50%

52%

53%

55%

57%

59%

85

39%

43%

44%

45%

46%

47%

49%

50%

52%

53%

55%

57%

59%

61%

63%

90

41%

45%

46%

47%

49%

50%

51%

53%

55%

56%

58%

60%

62%

64%

67%

95

43%

48%

49%

50%

51%

53%

54%

56%

58%

59%

61%

63%

66%

68%

70%

100

46%

50%

51%

53%

54%

56%

57%

59%

61%

63%

65%

67%

69%

71%

74%

105

48%

53%

54%

55%

57%

58%

60%

62%

64%

66%

68%

70%

72%

75%

78%

110

50%

55%

56%

58%

59%

61%

63%

65%

67%

69%

71%

73%

76%

79%

81%

115

52%

58%

59%

61%

62%

64%

66%

68%

70%

72%

74%

77%

79%

82%

85%

120

55%

60%

62%

63%

65%

67%

69%

71%

73%

75%

77%

80%

83%

86%

89%

125

57%

63%

64%

66%

68%

69%

71%

74%

76%

78%

81%

83%

86%

89%

93%

130

59%

65%

67%

68%

70%

72%

74%

76%

79%

81%

84%

87%

90%

93%

96%

135

62%

68%

69%

71%

73%

75%

77%

79%

82%

84%

87%

90%

93%

96%

SS S

ON O

Table 3.2. Continued

For %HRmax calculation from age-estimated maximum (220 - age) or from %HRpeak taken from an exercise test

Table 3.2. Continued

For %HRmax calculation from age-estimated maximum (220 - age) or from %HRpeak taken from an exercise test

Age

15

20

25

30

35

40

45

50

55

60

65

70

75

80

85

(years)

205

200

195

190

185

180

175

170

165

160

155

150

145

140

135

HRpeak

140

64%

70%

72%

74%

76%

78%

80%

82%

85%

88%

90%

93%

97%

100%

145

66%

73%

74%

76%

78%

81%

83%

85%

88%

91%

94%

97%

100%

150

68%

75%

77%

79%

81%

83%

86%

88%

91%

94%

97%

100%

155

71%

78%

79%

82%

84%

86%

89%

91%

94%

97%

100%

160

73%

80%

82%

84%

86%

89%

91%

94%

97%

100%

165

75%

83%

85%

87%

89%

92%

94%

97%

100%

170

78%

85%

87%

89%

92%

94%

97%

100%

175

80%

88%

90%

92%

95%

97%

100%

180

82%

90%

92%

95%

97%

100%

185

84%

93%

95%

97%

100%

190

87%

95%

97%

100%

195

89%

98%

100%

200

91%

100%

To determine the target heart rate, find either the patient's maximal heart rate based on age or the true maximum of peak determined from an exercise test along the top ^

row. Read down the column below this figure to the desired relative intensity, expressed as a percentage of maximal or peak. Then read back across that row to the left hand column, which provides the target heart rate in beats-mkf1. ^

Adapted from Christensen. 1931; Robinson. 1938; and Astrand and Rhyming. 1954; cited in Astrand. et al, 2003. ir s?

To determine the target heart rate, find either the patient's maximal heart rate based on age or the true maximum of peak determined from an exercise test along the top ^

Cl row. Read down the column below this figure to the desired relative intensity, expressed as a percentage of maximal or peak. Then read back across that row to the left hand column, which provides the target heart rate in beats-mkf1. ^

Adapted from Christensen. 1931; Robinson. 1938; and Astrand and Rhyming. 1954; cited in Astrand. et al, 2003. ir s>

Table 3.3. Beta-blocked target heart rate determination

For %HRmax calculation from age-estimated maximum (220 - age) or from %HRpeak taken from an exercise test ^ _ ^

Table 3.3. Beta-blocked target heart rate determination

For %HRmax calculation from age-estimated maximum (220 - age) or from %HRpeak taken from an exercise test ^ _ ^

Age

15

20

25

30

35

40

45

50

55

60

65

70

75

80

85

«—i o

(years)

175

170

165

160

155

150

145

140

135

130

125

120

115

110

105

HRpeak

SS S

Target

a. 1

Heart rate

(bpm)

a

40

23%

24%

24%

25%

26%

27%

28%

29%

30%

31%

32%

33%

35%

36%

38%

O

45

26%

26%

27%

28%

29%

30%

31%

32%

33%

35%

36%

38%

39%

41%

43%

Cs

50

29%

29%

30%

31%

32%

33%

34%

36%

37%

38%

40%

42%

43%

45%

48%

55

31%

32%

33%

34%

35%

37%

38%

39%

41%

42%

44%

46%

48%

50%

52%

60

34%

35%

36%

38%

39%

40%

41%

43%

44%

46%

48%

50%

52%

55%

57%

&

65

37%

38%

39%

41%

42%

43%

45%

46%

48%

50%

52%

54%

57%

59%

62%

ns -!

70

40%

41%

42%

44%

45%

47%

48%

50%

52%

54%

56%

58%

61%

64%

67%

¡3'

75

43%

44%

45%

47%

48%

50%

52%

54%

56%

58%

60%

63%

65%

68%

71%

<15

80

46%

47%

48%

50%

52%

53%

55%

57%

59%

62%

64%

67%

70%

73%

76%

85

49%

50%

52%

53%

55%

57%

59%

61%

63%

65%

68%

71%

74%

77%

81%

90

51%

53%

55%

56%

58%

60%

62%

64%

67%

69%

72%

75%

78%

82%

86%

95

54%

56%

58%

59%

61%

63%

66%

68%

70%

73%

76%

79%

83%

86%

90%

100

57%

59%

61%

63%

65%

67%

69%

71%

74%

77%

80%

83%

87%

91%

95%

105

60%

62%

64%

66%

68%

70%

72%

75%

78%

81%

84%

88%

91%

95%

100%

110

63%

65%

67%

69%

71%

73%

76%

79%

81%

85%

88%

92%

96%

100%

115

66%

68%

70%

72%

74%

77%

79%

82%

85%

88%

92%

96%

100%

120

69%

71%

73%

75%

77%

80%

83%

86%

89%

92%

96%

100%

Table 3.3. Continued

Foi

' %HRmax calculation from age-

-estimated maximum (220

-age)

or from %HRpeak taken from an exercise test

Age

15

20

25

30

35

40

45

50

55

60

65 70 75 80

85

(years)

175

170

165

160

155

150

145

140

135

130

125 120 115 110

105

HRpeak

125

71%

74%

76%

78%

81%

83%

86%

89%

93%

96%

100%

130

74%

76%

79%

81%

84%

87%

90%

93%

96%

100%

135

77%

79%

82%

84%

87%

90%

93%

96%

100%

140

80%

82%

85%

88%

90%

93%

97% 100%

145

83%

85%

88%

91%

94%

97%

100%

150

86%

88%

91%

94%

97%

100%

155

89%

91%

94%

97%

100%

160

91%

94%

97%

100%

165

94%

97%

100%

170

97%

100%

175

100%

180

185

190

p ss

To determine the target heart rate, find either the patient's maximal heart rate based on age or the true maximum of peak determined from an exercise test along the top row. Read down the column below this figure to the desired relative intensity, expressed as a percentage of maximal or peak. Then read back across that row to the left hand ^ column, which provides the target heart rate in beats-mkf1. s^

Adapted from Davies and Sargeant 1979; Eston and Connelly, 1996, Liu, et al, 2000.

Table 3.4.

Calculation tables of 50% to 70%

of maximal

or peak heart rate

reserve

50%HRR

HR rest

HR rest

HR rest

HR rest

HR rest

HR rest HR rest

HR rest

HR rest

HR rest

HR rest

max/peak

45

50

55

60

65

70

75

80

85

90

95

HR max/pk

185

115

118

120

123

125

128

130

133

135

138

140

180

113

115

118

120

123

125

128

130

133

135

138

175

110

113

115

118

120

123

125

128

130

133

135

170

108

110

113

115

118

120

123

125

128

130

133

165

105

108

110

113

115

118

120

123

125

128

130

160

103

105

108

110

113

115

118

120

123

125

128

165

105

108

110

113

115

118

120

123

125

128

130

160

103

105

108

110

113

115

118

120

123

125

128

155

100

103

105

108

110

113

115

118

120

123

125

150

98

100

103

105

108

110

113

115

118

120

123

145

95

98

100

103

105

108

110

113

115

118

120

140

93

95

98

100

103

105

108

110

113

115

118

135

90

93

95

98

100

103

105

108

110

113

115

130

88

90

93

95

98

100

103

105

108

110

113

125

85

88

90

93

95

98

100

103

105

108

110

120

83

85

88

90

93

95

98

100

103

105

108

115

80

83

85

88

90

93

95

98

100

103

105

110

78

80

83

85

88

90

93

95

98

100

103

105

75

78

80

83

85

88

90

93

95

98

100

100

73

75

78

80

83

85

88

90

93

95

Table 3.4. Continued

65%HRR

max/peak

HR rest

HR rest

HR rest

HR rest

HR rest

HR rest

HR rest

HR rest

HR rest

HR rest

HR rest

45

50

55

60

65

70

75

80

85

90

95

HR max/pk

185

136

138

140

141

143

145

147

148

150

152

154

180

133

135

136

138

140

142

143

145

147

149

150

175

130

131

133

135

137

138

140

142

144

145

147

170

126

128

130

132

133

135

137

139

140

142

144

165

123

125

127

128

130

132

134

135

137

139

141

160

120

122

123

125

127

129

130

132

134

136

137

165

123

125

127

128

130

132

134

135

137

139

141

160

120

122

123

125

127

129

130

132

134

136

137

155

117

118

120

122

124

125

127

129

131

132

134

150

113

115

117

119

120

122

124

126

127

129

131

145

110

112

114

115

117

119

121

122

124

126

128

140

107

109

110

112

114

116

117

119

121

123

124

135

104

105

107

109

111

112

114

116

118

119

121

130

100

102

104

106

107

109

111

113

114

116

118

125

97

99

101

102

104

106

108

109

111

113

115

120

94

96

97

99

101

103

104

106

108

110

111

115

91

92

94

96

98

99

101

103

105

106

108

110

87

89

91

93

94

96

98

100

101

103

105

105

84

86

88

89

91

93

95

96

98

100

102

100

81

83

84

86

88

90

91

93

95

97

 70%HRR max/peak 45 50 55 60 65 70 75 80 85 90 95 HR max/pk 185 143 145 146 148 149 151 152 154 155 157 158 180 140 141 143 144 146 147 149 150 152 153 155 175 136 138 139 141 142 144 145 147 148 150 151 170 133 134 136 137 139 140 142 143 145 146 148 165 129 131 132 134 135 137 138 140 141 143 144 160 126 127 129 130 132 133 135 136 138 139 141 165 129 131 132 134 135 137 138 140 141 143 144 160 126 127 129 130 132 133 135 136 138 139 141 155 122 124 125 127 128 130 131 133 134 136 137 150 119 120 122 123 125 126 128 129 131 132 134 145 115 117 118 120 121 123 124 126 127 129 130 140 112 113 115 116 118 119 121 122 124 125 127 135 108 110 111 113 114 116 117 119 120 122 123 130 105 106 108 109 111 112 114 115 117 118 120 125 101 103 104 106 107 109 110 112 113 115 116 120 98 99 101 102 104 105 107 108 110 111 113 115 94 96 97 99 100 102 103 105 106 108 109 110 91 92 94 95 97 98 100 101 103 104 106 105 87 89 90 92 93 95 96 98 99 101 102 100 84 85 87 88 90 91 93 94 96 97 99

Choose the table that is for a target of 50%, 65% or 70% of maximal heart rate reserve. Read down the left hand column to the patient's maximal heart rate or peak heart rate determined from an age estimated maximum or an exercise test, respectively. Then read across the row that corresponds to the patient's resting heart rate, noted at the top of the column.

Adapted from Karvonen, et al, 1957.

Choose the table that is for a target of 50%, 65% or 70% of maximal heart rate reserve. Read down the left hand column to the patient's maximal heart rate or peak heart rate determined from an age estimated maximum or an exercise test, respectively. Then read across the row that corresponds to the patient's resting heart rate, noted at the top of the column.

Adapted from Karvonen, et al, 1957.

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