Exercise intensity influences nonexercise activity thermogenesis in overweight and obese adults

Mohammad A. Alahmadi, Andrew P. Hills, Neil A. King, Nuala M. Byrne

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Abstract

PURPOSE: The purpose of this study was to determine the effect of acute bouts of moderate- and high-intensity walking exercise on nonexercise activity thermogenesis (NEAT) in overweight and obese adults. METHODS: Sixteen participants performed a single bout of either moderate-intensity walking exercise (MIE) or high-intensity walking exercise (HIE) on two separate occasions. The MIE consisted of walking for 60 min on a motorized treadmill at 6 km·h. The 60-min HIE session consisted of walking in 5-min intervals at 6 km·h and 10% grade followed by 5 min at 0% grade. NEAT was assessed by accelerometer 3 d before, on the day of, and 3 d after the exercise sessions. RESULTS: There was no significant difference in NEAT vector magnitude (counts per minute) between the preexercise period (days 1-3) and the exercise day (day 4) for either the MIE or the HIE protocol. In addition, there was no change in NEAT during the 3 d after the MIE session; however, NEAT increased by 16% on day 7 (postexercise) compared with the exercise day (P = 0.32). However, during the postexercise period after the HIE session, NEAT was increased by 25% on day 7 compared with the exercise day (P = 0.08) and by 30%-33% compared with the preexercise period (days 1, 2, and 3; P = 0.03, 0.03, and 0.02, respectively). CONCLUSION: A single bout of either MIE or HIE did not alter NEAT on the exercise day or on the first 2 d after the exercise session. However, monitoring NEAT on a third day allowed the detection of a 48-h delay in increased NEAT after performing HIE. A longer-term intervention is needed to determine the effect of accumulated exercise sessions over a week on NEAT.

Original languageEnglish
Pages (from-to)624-631
Number of pages8
JournalMedicine and Science in Sports and Exercise
Volume43
Issue number4
DOIs
Publication statusPublished - Apr 2011
Externally publishedYes

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Thermogenesis
Walking
Exercise

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Alahmadi, Mohammad A. ; Hills, Andrew P. ; King, Neil A. ; Byrne, Nuala M. / Exercise intensity influences nonexercise activity thermogenesis in overweight and obese adults. In: Medicine and Science in Sports and Exercise. 2011 ; Vol. 43, No. 4. pp. 624-631.
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abstract = "PURPOSE: The purpose of this study was to determine the effect of acute bouts of moderate- and high-intensity walking exercise on nonexercise activity thermogenesis (NEAT) in overweight and obese adults. METHODS: Sixteen participants performed a single bout of either moderate-intensity walking exercise (MIE) or high-intensity walking exercise (HIE) on two separate occasions. The MIE consisted of walking for 60 min on a motorized treadmill at 6 km·h. The 60-min HIE session consisted of walking in 5-min intervals at 6 km·h and 10{\%} grade followed by 5 min at 0{\%} grade. NEAT was assessed by accelerometer 3 d before, on the day of, and 3 d after the exercise sessions. RESULTS: There was no significant difference in NEAT vector magnitude (counts per minute) between the preexercise period (days 1-3) and the exercise day (day 4) for either the MIE or the HIE protocol. In addition, there was no change in NEAT during the 3 d after the MIE session; however, NEAT increased by 16{\%} on day 7 (postexercise) compared with the exercise day (P = 0.32). However, during the postexercise period after the HIE session, NEAT was increased by 25{\%} on day 7 compared with the exercise day (P = 0.08) and by 30{\%}-33{\%} compared with the preexercise period (days 1, 2, and 3; P = 0.03, 0.03, and 0.02, respectively). CONCLUSION: A single bout of either MIE or HIE did not alter NEAT on the exercise day or on the first 2 d after the exercise session. However, monitoring NEAT on a third day allowed the detection of a 48-h delay in increased NEAT after performing HIE. A longer-term intervention is needed to determine the effect of accumulated exercise sessions over a week on NEAT.",
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Exercise intensity influences nonexercise activity thermogenesis in overweight and obese adults. / Alahmadi, Mohammad A.; Hills, Andrew P.; King, Neil A.; Byrne, Nuala M.

In: Medicine and Science in Sports and Exercise, Vol. 43, No. 4, 04.2011, p. 624-631.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Exercise intensity influences nonexercise activity thermogenesis in overweight and obese adults

AU - Alahmadi, Mohammad A.

AU - Hills, Andrew P.

AU - King, Neil A.

AU - Byrne, Nuala M.

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N2 - PURPOSE: The purpose of this study was to determine the effect of acute bouts of moderate- and high-intensity walking exercise on nonexercise activity thermogenesis (NEAT) in overweight and obese adults. METHODS: Sixteen participants performed a single bout of either moderate-intensity walking exercise (MIE) or high-intensity walking exercise (HIE) on two separate occasions. The MIE consisted of walking for 60 min on a motorized treadmill at 6 km·h. The 60-min HIE session consisted of walking in 5-min intervals at 6 km·h and 10% grade followed by 5 min at 0% grade. NEAT was assessed by accelerometer 3 d before, on the day of, and 3 d after the exercise sessions. RESULTS: There was no significant difference in NEAT vector magnitude (counts per minute) between the preexercise period (days 1-3) and the exercise day (day 4) for either the MIE or the HIE protocol. In addition, there was no change in NEAT during the 3 d after the MIE session; however, NEAT increased by 16% on day 7 (postexercise) compared with the exercise day (P = 0.32). However, during the postexercise period after the HIE session, NEAT was increased by 25% on day 7 compared with the exercise day (P = 0.08) and by 30%-33% compared with the preexercise period (days 1, 2, and 3; P = 0.03, 0.03, and 0.02, respectively). CONCLUSION: A single bout of either MIE or HIE did not alter NEAT on the exercise day or on the first 2 d after the exercise session. However, monitoring NEAT on a third day allowed the detection of a 48-h delay in increased NEAT after performing HIE. A longer-term intervention is needed to determine the effect of accumulated exercise sessions over a week on NEAT.

AB - PURPOSE: The purpose of this study was to determine the effect of acute bouts of moderate- and high-intensity walking exercise on nonexercise activity thermogenesis (NEAT) in overweight and obese adults. METHODS: Sixteen participants performed a single bout of either moderate-intensity walking exercise (MIE) or high-intensity walking exercise (HIE) on two separate occasions. The MIE consisted of walking for 60 min on a motorized treadmill at 6 km·h. The 60-min HIE session consisted of walking in 5-min intervals at 6 km·h and 10% grade followed by 5 min at 0% grade. NEAT was assessed by accelerometer 3 d before, on the day of, and 3 d after the exercise sessions. RESULTS: There was no significant difference in NEAT vector magnitude (counts per minute) between the preexercise period (days 1-3) and the exercise day (day 4) for either the MIE or the HIE protocol. In addition, there was no change in NEAT during the 3 d after the MIE session; however, NEAT increased by 16% on day 7 (postexercise) compared with the exercise day (P = 0.32). However, during the postexercise period after the HIE session, NEAT was increased by 25% on day 7 compared with the exercise day (P = 0.08) and by 30%-33% compared with the preexercise period (days 1, 2, and 3; P = 0.03, 0.03, and 0.02, respectively). CONCLUSION: A single bout of either MIE or HIE did not alter NEAT on the exercise day or on the first 2 d after the exercise session. However, monitoring NEAT on a third day allowed the detection of a 48-h delay in increased NEAT after performing HIE. A longer-term intervention is needed to determine the effect of accumulated exercise sessions over a week on NEAT.

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JO - Medicine and science in sports

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