Repeated Prolonged Exercise Decreases Maximal Fat Oxidation in Older Men

The present study aimed to investigate the potential effect of different aerobic fitness levels on substrate oxidation in trained taekwondo athletes. 57 male athletes (age 21.10±7.79 years; VO2max 50.67±6.67 ml/kg/min) with regular weekly taekwondo training and training experience of at least three years completed a graded exercise test to exhaustion on a treadmill. Maximal fat oxidation (MFO), the exercise intensity related to MFO (Fatmax), and carbohydrate (CHO) oxidation rate were measured using indirect calorimetry methods. The athletes then were divided into a low (<50 ml/kg/min, n=18) and high (>50 ml/kg/min, n=39) VO2max group. The average MFO was higher in the high VO2max group than in the low VO2max group (0.46±0.19 vs 0.28±0.11 g/min; P<0.001). Although Fatmax tended toward higher values in the high VO2max group, no difference was observed between the groups (49.15±15.22 vs 42.42±12.37% of VO2max; P=0.18). It was also shown that the high VO2max group had a lower CHO oxidation rate and a higher fat oxidation rate at given exercise intensities. In conclusion, it seems that MFO and substrate oxidation rates in taekwondo athletes can be influenced by aerobic fitness level such that the athletes with higher VO2max appeared to use more fat as a fuel source for energy supply during a given exercise.

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Serum EMAP‐II in Young and Older Men During Prolonged Exercise in Temperate and Hot Conditions

The FASEB Journal ◽

10.1096/fasebj.2021.35.s1.00291 ◽

2021 ◽

Vol 35 (S1) ◽

Author(s):

Melissa Cote ◽

W. Journeay ◽

James McCormick ◽

Sean Notley ◽

Glen Kenny

Keyword(s):

Prolonged Exercise ◽

Older Men ◽

Emap Ii

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Maximal Fat Oxidation: Comparison between Treadmill, Elliptical and Rowing Exercises

Journal of Sports Science and Medicine ◽

10.52082/jssm.2021.170 ◽

2021 ◽

pp. 170-178

Author(s):

Michelle Filipovic ◽

Stephanie Munten ◽

Karl-Heinz Herzig ◽

Dominique D. Gagnon

Keyword(s):

Oxygen Consumption ◽

Venous Blood ◽

Maximal Oxygen Consumption ◽

Blood Gases ◽

Fat Oxidation ◽

Peak Oxygen Consumption ◽

Whole Body ◽

Mixed Venous Blood ◽

Exercise Modality ◽

Maximal Fat Oxidation

Fat oxidation during exercise is associated with cardio-metabolic benefits, but the extent of which whole-body exercise modality elicits the greatest fat oxidation remains unclear. We investigated the effects of treadmill, elliptical and rowing exercise on fat oxidation in healthy individuals. Nine healthy males participated in three, peak oxygen consumption tests, on a treadmill, elliptical and rowing ergometer. Indirect calorimetry was used to assess maximal oxygen consumption (V̇O2peak), maximal fat oxidation (MFO) rates, and the exercise intensity MFO occurred (Fatmax). Mixed venous blood was collected to assess lactate and blood gases concentrations. While V̇O2peak was similar between exercise modalities, MFO rates were higher on the treadmill (mean ± SD; 0.61 ± 0.06 g·min-1) compared to both the elliptical (0.41 ± 0.08 g·min-1, p = 0.022) and the rower (0.40 ± 0.08 g·min-1, p = 0.017). Fatmax values were also significantly higher on the treadmill (56.0 ± 6.2 %V̇O2peak) compared to both the elliptical (36.8 ± 5.4 %V̇O2peak, p = 0.049) and rower (31.6 ± 5.0 %V̇O2peak, p = 0.021). Post-exercise blood lactate concentrations were also significantly lower following treadmill exercise (p = 0.021). Exercising on a treadmill maximizes fat oxidation to a greater extent than elliptical and rowing exercises, and remains an important exercise modality to improve fat oxidation, and consequently, cardio-metabolic health.

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Body Fat has No Effect on the Maximal Fat Oxidation Rate in Young, Normal, and Overweight Women

The Journal of Strength and Conditioning Research ◽

10.1519/jsc.0000000000000512 ◽

2014 ◽

Vol 28 (8) ◽

pp. 2121-2126 ◽

Cited By ~ 5

Author(s):

Ashley N. Blaize ◽

Jeffrey A. Potteiger ◽

Randal P. Claytor ◽

Douglas A. Noe

Keyword(s):

Body Fat ◽

Oxidation Rate ◽

Fat Oxidation ◽

Overweight Women ◽

Maximal Fat Oxidation

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Ultra Trail Performance is Differently Predicted by Endurance Variables in Men and Women

International Journal of Sports Medicine ◽

10.1055/a-1255-3083 ◽

2020 ◽

Cited By ~ 1

Author(s):

Ignacio Martinez-Navarro ◽

Antonio Montoya-Vieco ◽

Eladio Collado ◽

Bárbara Hernando ◽

Carlos Hernando

Keyword(s):

Oxygen Uptake ◽

Female Athletes ◽

Fat Oxidation ◽

Peak Oxygen Uptake ◽

Significant Variable ◽

Men And Women ◽

Male And Female ◽

Race Time ◽

Maximal Fat Oxidation ◽

Peak Speed

AbstractThe study aimed to assess the relationship between peak oxygen uptake, ventilatory thresholds and maximal fat oxidation with ultra trail male and female performance. 47 athletes (29 men and 18 women) completed a cardiopulmonary exercise test between 2 to 4 weeks before a 107-km ultra trail. Body composition was also analyzed using a bioelectrical impedance weight scale. Exploratory correlation analyses showed that peak oxygen uptake (men: r=–0.63, p=0.004; women: r=–0.85, p < 0.001), peak speed (men: r=–0.74, p < 0.001; women: r=–0.69, p=0.009), speed at first (men: r=–0.49, p=0.035; women: r=–0.76, p=0.003) and second (men: r=–0.73, p < 0.001; women: r=–0.76, p=0.003) ventilatory threshold, and maximal fat oxidation (men: r=–0.53, p=0.019; women: r=–0.59, p=0.033) were linked to race time in male and female athletes. Percentage of fat mass (men: r=0.58, p=0.010; women: r=0.62, p= 0.024) and lean body mass (men: r=–0.61, p=0.006; women: r=–0.61, p=0.026) were also associated with performance in both sexes. Subsequent multiple regression analyses revealed that peak speed and maximal fat oxidation together were able to predict 66% of male performance; while peak oxygen uptake was the only statistically significant variable explaining 69% of the variation in women’s race time. These results, although exploratory in nature, suggest that ultra trail performance is differently predicted by endurance variables in men and women.

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