Improved running economy following intensified training correlates with reduced ventilatory demands

Franch, Jesper; Madsen, Klavs; Djurhuus, M. S.; Pedersen, Poul Møller

doi:10.1097/00005768-199808000-00011

Cited by 114 publications

(84 citation statements)

References 30 publications

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“…Additionally, 24 weeks of low-volume and high-volume resistance exercise-based circuit training is capable of improving measures of muscular strength, power, and endurance, including 1RM bench press and leg press, vertical jump power, and bench press and leg press repetitions to failure at 80% 1RM (Marx et al, 2001). Given that CrossFit incorporates elements of metabolic conditioning including both aerobic and anaerobic, as well as resistance-based training in combination, it is likely that chronic training would lead to similar improvements in aerobic power, anaerobic capacity, and muscular fitness as seen by Tabata et al and Franch et al (Franch et al, 1998). In addition, CrossFit may lead to improved markers of metabolic health, given that shorter and intense exercise bouts similar in nature to CrossFit training have been shown to elicit positive effects on symptoms associated with cardiometabolic diseases such as coronary heart disease (Gibala, …”

Section: Discussionmentioning

confidence: 99%

“…This finding is similar to investigations of other forms of high-intensity interval-type training and resistance exercise-based circuit training that have resulted in improved measures of fitness (Laursen & Jenkins, 2002). Franch et al (Franch, Madsen, Djurhuus, & Pedersen, 1998) showed that 6 weeks of intense interval training using 4 to 6 sets of 4 minute intervals resulted in a 6% improvement in VO2max and a greater increase in time to exhaustion at 85% VO2max compared to 6 weeks of continuous running (+93% vs. +67%, respectively). Similarly, Tabata et al reported a 7 ml/kg/min increase in VO2max in addition to a 28% increase in anaerobic capacity following 6 weeks of 7 to 8 sets of 20 second cycling at ~170% VO2max with a 10 second rest period between bouts while 6 weeks of sustained moderate-intensity exercise resulted in a 5 ml/kg/min increase in VO2max, but no increase in anaerobic capacity.…”

Section: Discussionmentioning

confidence: 99%

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Metabolic profile of a crossfit training bout

Escobar¹,

Morales²,

VanDusseldorp³

2017

jhse

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CrossFit is a physically and metabolically-demanding training mode increasing in popularity among recreational athletes. Presently, however, scarce evidence is available documenting its energetic profile. This study investigated the metabolic characteristics of a CrossFit training bout as measured by expired gases and blood lactate. Eleven females and 7 males completed a 12-minute CrossFit bout on two occasions separated by three days. During both experimental sessions (Pt1, Pt2), subjects performed as many rounds as possible (AMRAP) within the timed workout which consisted of consisted of 12 box jumps (30" for males, 20" for females), 6 thrusters (24 kg for males, 16 kg for females), and 6 bar-facing burpees in sequence. Oxygen consumption (VO2), respiratory exchange ratio (RER), blood lactate (BL), and repetitions completed were measured during both experimental sessions. The average VO2 and RER of both bouts (Pt1 and Pt2) was 37.0 ± 4.8 ml/kg/min and 1.04 ± 0.1, respectively. Average BL significantly increased above pre-exercise concentrations (3.0 ± 1.3 mmol/L) at 4 min (10.1 ± 3.2 mmol/L; p < 0.01), 8 min (12.3 ± 3.5 mmol/L; p < 0.01), and immediately post at 12 min (12.6 ± 3.9 mmol/L; p < 0.01). Repetitions completed in Pt2 (140.2 ± 25.9) were significantly different to repetitions completed in Pt1 (131.2 ± 27.2) (p = 0.023). Average repetitions completed in Pt1 and Pt 2 was 135.7 ± 26.6. These data suggest that CrossFit is a metabolicallydemanding conditioning method that relies heavily on both aerobic and anaerobic energy production and may represent an alternative to traditional methods of exercise to improve fitness and longevity.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Metabolic profile of a crossfit training bout

Escobar¹,

Morales²,

VanDusseldorp³

2017

jhse

View full text Add to dashboard Cite

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“…The trainability of running economy, however, is uncertain. Some studies have shown that training volume significantly improved running economy 19,[39][40][41] , while other studies have shown no improvement 7,42 .…”

Section: Discussionmentioning

confidence: 99%

Distribution of Training Volume and Intensity of Elite Male and Female Track and Marathon Runners

Enoksen

Tjelta

2011

International Journal of Sports Science & Coaching

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The aim of this study was to compare training volume and the distribution of training intensity of six of the best long-distance runners in Norway from the last decade.Three international-level long-distance runners (two males and one female) and three marathon runners (one male and two females) were included. The runners' training diaries for one of the seasons they competed in an international championship were analysed. The reported running volume (km/week) was used to estimate the distribution of training at the prescribed intensity zones in representative weeks in the preparation period and in the competition season.During the preparation period (November -February) the marathon runners ran an average of 186.6 ± 25.7 km/week and the track runners 161 ± 11 km/week. For all runners, 80 ± 5% of the weekly training distance (km/week) in this period was continuous running with a heart rate (HR) between 65-82% of maximum. The remaining 20% of total training volume (km/week) was performed at intensities near and above the anaerobic threshold (82-92% of HRmax). This was done in three to five weekly interval sessions or continuous running sessions. All athletes ran 11 -13 sessions per week. The training volume (km/week) in the pre-competition period and the competition season did not differ much from the volume in the preparation period. The track runners increased the amount of highintensity training at specific race pace in the pre-competition period (March and April), and in the track competition season (May -September).

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“…The trainability of running economy, however, shows conflicting results. Some studies have shown that training volume significantly improved running economy 26,35,50,51 , while other studies have shown no improvement 52,53 .…”

Section: Training Volumementioning

confidence: 99%

Training Characteristics of Male Junior Cross Country and Track Runners on European Top Level

Tjelta

Enoksen

2010

International Journal of Sports Science & Coaching

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The purpose of the present study was to describe training characteristics of distance junior runners at European top level. INTRODUCTIONThe question of how to organize daily training to improve aerobic capacity in elite junior endurance athletes is a debated topic among coaches and researchers throughout the world, and several attempts have been made to construct a model of optimal endurance training 1,2 . In a training program for long-distance runners, the most essential exercise variables are training volume (km/week), training frequency (training units/week) and intensity distribution measured in percent of maximum heart rate (% HR max ) or in percent of V · O 2 max

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Improved running economy following intensified training correlates with reduced ventilatory demands

Cited by 114 publications

References 30 publications

Metabolic profile of a crossfit training bout

Metabolic profile of a crossfit training bout

Distribution of Training Volume and Intensity of Elite Male and Female Track and Marathon Runners

Training Characteristics of Male Junior Cross Country and Track Runners on European Top Level

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