TY - JOUR
T1 - Acute changes in glycemic homeostasis in response to brief high-intensity intermittent exercise in obese adults
AU - Nie, Jinlei
AU - Kong, Zhaowei
AU - Baker, Julien
AU - Tong, Tom K K
AU - Lei, Seng Hong
AU - Shi, Qingde
N1 - Funding Information:
The study was supported by a research grant from Macao Polytechnic Institute ( RP/ESEFD-02/2012 ).
PY - 2012/12
Y1 - 2012/12
N2 - This study investigated the acute changes in glycemic homeostasis in response to brief, high-intensity, intermittent exercise in obese adults. Ten obese adults (age: 25.3±5.1 years; body mass index: 32.0±4.0) volunteered to participate in the study. The time-course changes in blood glucose in response to a 75-g oral glucose tolerance test were examined following: high-intensity intermittent exercise (HIE) of four 30-second all-out cycling efforts interspersed with 4-minute active recovery periods; 24 hours of recovery post-HIE (REC); and no treatment (control, CON). Blood glucose in each trial was measured before, and 30, 60, 90, and 120 minutes after glucose intake (GI). Blood glucose (mmol/L) at 30 minutes post-GI in the HIE (6.9±0.4) trial was significantly lower (p<0.05) than the corresponding values of the CON (9.0±0.4) and REC (8.8±0.4) trials. Blood glucose concentration at 120 minutes post-GI in the REC (5.7±0.3) trial was also significantly lower (p<0.05) than the corresponding value of the CON (6.9±0.4) trial. When blood glucose values were plotted against corresponding time points, the area under the curve (mmol/L/minute) of the CON (890±43) trial was significantly greater (p<0.05) than that of the HIE (834±40) and REC (846±32) trials. The HIE and REC conditions were not significantly different (p>0.05). This study demonstrated the improvement in glycemic homeostasis in obese adults immediately after brief, high-intensity, intermittent exercise. These effects were maintained for at least 24 hours postexercise. The findings may be useful in the development of time-efficient lifestyle intervention strategies for improving obesity-related risk factors for diabetes.
AB - This study investigated the acute changes in glycemic homeostasis in response to brief, high-intensity, intermittent exercise in obese adults. Ten obese adults (age: 25.3±5.1 years; body mass index: 32.0±4.0) volunteered to participate in the study. The time-course changes in blood glucose in response to a 75-g oral glucose tolerance test were examined following: high-intensity intermittent exercise (HIE) of four 30-second all-out cycling efforts interspersed with 4-minute active recovery periods; 24 hours of recovery post-HIE (REC); and no treatment (control, CON). Blood glucose in each trial was measured before, and 30, 60, 90, and 120 minutes after glucose intake (GI). Blood glucose (mmol/L) at 30 minutes post-GI in the HIE (6.9±0.4) trial was significantly lower (p<0.05) than the corresponding values of the CON (9.0±0.4) and REC (8.8±0.4) trials. Blood glucose concentration at 120 minutes post-GI in the REC (5.7±0.3) trial was also significantly lower (p<0.05) than the corresponding value of the CON (6.9±0.4) trial. When blood glucose values were plotted against corresponding time points, the area under the curve (mmol/L/minute) of the CON (890±43) trial was significantly greater (p<0.05) than that of the HIE (834±40) and REC (846±32) trials. The HIE and REC conditions were not significantly different (p>0.05). This study demonstrated the improvement in glycemic homeostasis in obese adults immediately after brief, high-intensity, intermittent exercise. These effects were maintained for at least 24 hours postexercise. The findings may be useful in the development of time-efficient lifestyle intervention strategies for improving obesity-related risk factors for diabetes.
KW - High-intensity interval exercise
KW - Obesity
KW - Oral glucose tolerance test
UR - http://www.scopus.com/inward/record.url?scp=84872030396&partnerID=8YFLogxK
U2 - 10.1016/j.jesf.2012.10.007
DO - 10.1016/j.jesf.2012.10.007
M3 - Journal article
AN - SCOPUS:84872030396
SN - 1728-869X
VL - 10
SP - 97
EP - 100
JO - Journal of Exercise Science and Fitness
JF - Journal of Exercise Science and Fitness
IS - 2
ER -