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Table 1 Responses to continuous cycling (CONT) compared with interval cycling of equivalent duration (INTV) (mean ± SD)

From: Enhancing energy expenditure and enjoyment of exercise during pregnancy through the addition of brief higher intensity intervals to traditional continuous moderate intensity cycling

  CONT INT
n = 12 n = 12
Physiological measures during 20-min conditioning
 Mean power output (W) 78 ± 22 99 ± 18a
 Mean power output15 sec effort (W) Not applicable 281 ± 72
 Mean heart rate (bpm) 126 ± 8 136 ± 1a
 Mean percentage HRmax 68 ± 4 73 ± 5a
\( \overset{.}{\mathrm{V}} \)O2 (L.min−1) 1.23 ± 0.24 1.57 ± 0.28a
 Est. energy expenditure (kJ) 506 ± 99 645 ± 116a
 Glucosepre (mmol∙L−1) 5.9 ± 1.0 5.6 ± 1.2
 Glucosepost (mmol∙L -1) 4.8 ± 0.8b 4.6 ± 0.9b
Psychological measures during 20-min conditioning
 Mean RPEoverall 11 ± 2 12 ± 1
 Mean RPE15s_effort Not applicable 16 ± 1
 Exercise enjoyment (PACES score) 82 ± 21 101 ± 12a
  1. Footnotes: HR max percentage age-predicted heart rate maximum, PACES Physical Activity Enjoyment Scale (higher score indicates greater enjoyment of exercise), RPE rate of perceived exertion from of 6 to 20 scale; 6 = no exertion, 20 = maximal exertion
  2. adenotes significant difference between conditions (P < 0.05)
  3. bdenotes significant difference pre/post within condition (P < 0 .05)