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Energy balance during two days of continuous stationary cycling.

Stewart IB, Stewart KL - J Int Soc Sports Nutr (2007)

Bottom Line: The athlete completed 46.7 hours, covering 1126 km, at a speed of 24 +/- 1.6 km/hr.He expended 14486 kcal and consumed 11098 kcal resulting in an energy deficit (-3290 kcal) and a weight loss (-0.55 kg).The carbohydrate (42 +/- 32 g/hr), water (422 +/- 441 ml/hr), and sodium (306 +/- 465 mg/hr) intake were all below current recommendations.

View Article: PubMed Central - HTML - PubMed

Affiliation: Institute of Health and Biomedical Innovation, Queensland University of Technology, Australia. i.stewart@qut.edu.au.

ABSTRACT
This study examined the capabilities of an ultraendurance athlete to self-regulate their diet during an attempt on the record for the longest period of stationary cycling. The attempt required the athlete to complete at least 20 km/hr, with a 15 minute break allowed every eight hours. Laboratory tests determined a heart rate-oxygen consumption regression equation enabling calculation of energy expenditure from heart rate during the attempt. Energy intake was determined by a non-weighed dietary record collected at the time of consumption. The athlete completed 46.7 hours, covering 1126 km, at a speed of 24 +/- 1.6 km/hr. He expended 14486 kcal and consumed 11098 kcal resulting in an energy deficit (-3290 kcal) and a weight loss (-0.55 kg). The carbohydrate (42 +/- 32 g/hr), water (422 +/- 441 ml/hr), and sodium (306 +/- 465 mg/hr) intake were all below current recommendations. The athlete was unable to self-regulate his diet or exercise intensity to prevent a negative energy balance.

No MeSH data available.


Related in: MedlinePlus

Cumulative energy intake and expenditure across the forty-six hours of continuous cycling.
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Figure 1: Cumulative energy intake and expenditure across the forty-six hours of continuous cycling.

Mentions: The cumulative energy intake and expenditure over the entire record attempt are displayed in Figure 1. The total energy intake was 11197 kcal (46.9 MJ) and expenditure 14487 kcal (60.7 MJ), producing an energy deficit over the course of the ride of 3290 kcal (13.8 MJ). The average hourly energy balance was -74 ± 208 kcal (range -543 – 439).


Energy balance during two days of continuous stationary cycling.

Stewart IB, Stewart KL - J Int Soc Sports Nutr (2007)

Cumulative energy intake and expenditure across the forty-six hours of continuous cycling.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2164944&req=5

Figure 1: Cumulative energy intake and expenditure across the forty-six hours of continuous cycling.
Mentions: The cumulative energy intake and expenditure over the entire record attempt are displayed in Figure 1. The total energy intake was 11197 kcal (46.9 MJ) and expenditure 14487 kcal (60.7 MJ), producing an energy deficit over the course of the ride of 3290 kcal (13.8 MJ). The average hourly energy balance was -74 ± 208 kcal (range -543 – 439).

Bottom Line: The athlete completed 46.7 hours, covering 1126 km, at a speed of 24 +/- 1.6 km/hr.He expended 14486 kcal and consumed 11098 kcal resulting in an energy deficit (-3290 kcal) and a weight loss (-0.55 kg).The carbohydrate (42 +/- 32 g/hr), water (422 +/- 441 ml/hr), and sodium (306 +/- 465 mg/hr) intake were all below current recommendations.

View Article: PubMed Central - HTML - PubMed

Affiliation: Institute of Health and Biomedical Innovation, Queensland University of Technology, Australia. i.stewart@qut.edu.au.

ABSTRACT
This study examined the capabilities of an ultraendurance athlete to self-regulate their diet during an attempt on the record for the longest period of stationary cycling. The attempt required the athlete to complete at least 20 km/hr, with a 15 minute break allowed every eight hours. Laboratory tests determined a heart rate-oxygen consumption regression equation enabling calculation of energy expenditure from heart rate during the attempt. Energy intake was determined by a non-weighed dietary record collected at the time of consumption. The athlete completed 46.7 hours, covering 1126 km, at a speed of 24 +/- 1.6 km/hr. He expended 14486 kcal and consumed 11098 kcal resulting in an energy deficit (-3290 kcal) and a weight loss (-0.55 kg). The carbohydrate (42 +/- 32 g/hr), water (422 +/- 441 ml/hr), and sodium (306 +/- 465 mg/hr) intake were all below current recommendations. The athlete was unable to self-regulate his diet or exercise intensity to prevent a negative energy balance.

No MeSH data available.


Related in: MedlinePlus