Abstract
Endurance training and ingestion of green tea extract (GTE), composed mainly of tea catechins (TC), are well known to enhance fat metabolism. However, their synergistic effects remain to be fully elucidated. We tested the hypothesis that endurance training supplemented with GTE would further accelerate whole-body fat utilization during exercise, compared with training alone, in humans. Twelve healthy male subjects [peak oxygen consumption, 50.7 ± 1.3 (SEM)mL/kg/min] were divided into two groups: GTE and placebo (PLA) groups. Subjects in both groups performed a cycle ergometer exercise at 60% of for 60min/day, 3 days/week, and daily ingested 572.8 or 0mg TC in GTE and PLA groups for 10 weeks, respectively. Before and after training, respiratory gas exchange was measured during 90-min exercise at pre-training ∼55% of After training, the average respiratory exchange ratio during exercise remained unchanged in the PLA group (post-training: 0.834 ± 0.008 vs pre-training: 0.841 ± 0.004), whereas it was lower in the GTE group (post-training: 0.816 ± 0.006 vs pre-training: 0.844 ± 0.005, P<0.05). These results suggest that habitual GTE ingestion, in combination with moderate-intense exercise, was beneficial to increase the proportion of whole-body fat utilization during exercise.
| Original language | English |
|---|---|
| Pages (from-to) | 598-605 |
| Number of pages | 8 |
| Journal | Scandinavian Journal of Medicine and Science in Sports |
| Volume | 21 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2011 Aug |
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Keywords
- Adipose tissue lipolysis
- Catechin
- Endurance
- Metabolic adaptation
- Training
ASJC Scopus subject areas
- Orthopedics and Sports Medicine
- Physical Therapy, Sports Therapy and Rehabilitation
Cite this
Effect of endurance training supplemented with green tea extract on substrate metabolism during exercise in humans. / Ichinose, Takashi; Nomura, S.; Someya, Y.; Akimoto, S.; Tachiyashiki, K.; Imaizumi, K.
In: Scandinavian Journal of Medicine and Science in Sports, Vol. 21, No. 4, 08.2011, p. 598-605.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of endurance training supplemented with green tea extract on substrate metabolism during exercise in humans
AU - Ichinose, Takashi
AU - Nomura, S.
AU - Someya, Y.
AU - Akimoto, S.
AU - Tachiyashiki, K.
AU - Imaizumi, K.
PY - 2011/8
Y1 - 2011/8
N2 - Endurance training and ingestion of green tea extract (GTE), composed mainly of tea catechins (TC), are well known to enhance fat metabolism. However, their synergistic effects remain to be fully elucidated. We tested the hypothesis that endurance training supplemented with GTE would further accelerate whole-body fat utilization during exercise, compared with training alone, in humans. Twelve healthy male subjects [peak oxygen consumption, 50.7 ± 1.3 (SEM)mL/kg/min] were divided into two groups: GTE and placebo (PLA) groups. Subjects in both groups performed a cycle ergometer exercise at 60% of for 60min/day, 3 days/week, and daily ingested 572.8 or 0mg TC in GTE and PLA groups for 10 weeks, respectively. Before and after training, respiratory gas exchange was measured during 90-min exercise at pre-training ∼55% of After training, the average respiratory exchange ratio during exercise remained unchanged in the PLA group (post-training: 0.834 ± 0.008 vs pre-training: 0.841 ± 0.004), whereas it was lower in the GTE group (post-training: 0.816 ± 0.006 vs pre-training: 0.844 ± 0.005, P<0.05). These results suggest that habitual GTE ingestion, in combination with moderate-intense exercise, was beneficial to increase the proportion of whole-body fat utilization during exercise.
AB - Endurance training and ingestion of green tea extract (GTE), composed mainly of tea catechins (TC), are well known to enhance fat metabolism. However, their synergistic effects remain to be fully elucidated. We tested the hypothesis that endurance training supplemented with GTE would further accelerate whole-body fat utilization during exercise, compared with training alone, in humans. Twelve healthy male subjects [peak oxygen consumption, 50.7 ± 1.3 (SEM)mL/kg/min] were divided into two groups: GTE and placebo (PLA) groups. Subjects in both groups performed a cycle ergometer exercise at 60% of for 60min/day, 3 days/week, and daily ingested 572.8 or 0mg TC in GTE and PLA groups for 10 weeks, respectively. Before and after training, respiratory gas exchange was measured during 90-min exercise at pre-training ∼55% of After training, the average respiratory exchange ratio during exercise remained unchanged in the PLA group (post-training: 0.834 ± 0.008 vs pre-training: 0.841 ± 0.004), whereas it was lower in the GTE group (post-training: 0.816 ± 0.006 vs pre-training: 0.844 ± 0.005, P<0.05). These results suggest that habitual GTE ingestion, in combination with moderate-intense exercise, was beneficial to increase the proportion of whole-body fat utilization during exercise.
KW - Adipose tissue lipolysis
KW - Catechin
KW - Endurance
KW - Metabolic adaptation
KW - Training
UR - http://www.scopus.com/inward/record.url?scp=79960244554&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79960244554&partnerID=8YFLogxK
U2 - 10.1111/j.1600-0838.2009.01077.x
DO - 10.1111/j.1600-0838.2009.01077.x
M3 - Article
VL - 21
SP - 598
EP - 605
JO - Scandinavian Journal of Medicine and Science in Sports
JF - Scandinavian Journal of Medicine and Science in Sports
SN - 0905-7188
IS - 4
ER -