Energetic Efficiency in Trained and Sedentary Rats After Exposure to Normobaric and Hyperbaric Oxygen

Eynan, Mirit; Ertracht, Offir; Yehezkel, Shiran; Svidovsky, Paulina; Ne'eman, Frida; Arieli, Ran

doi:10.3357/asem.2578.2010

Cited by 4 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To our knowledge, a standardized or commonly accepted method of progressive overload, which takes into account these key considerations, is currently unavailable. Previous investigations that have described a progressive overload have typically done so by increasing a combination of treadmill speed, incline, and exercise duration (Powers et al 1990;Criswell et al 1993;Mokelke et al 1997;Eddington et al 1998;Fiebig et al 1998;Demirel et al 1999;Noble et al 1999;Braga et al 2000;González et al 2000;Machida et al 2000;Jew and Moore 2002;Troxell et al 2003;Jafari et al 2005;Peres et al 2005;Ghanbari-Niaki 2006;Mueller and Hasser 2006;Yang et al 2006;Ghanbari-Niaki et al 2007;Leandro et al 2007;Mueller 2007;Harris et al 2008;Vichaiwong et al 2009;Eynan et al 2010). However, the descriptions of the increases in intensity or duration have often not been implemented in a systematic or standardized way, and as such a dose-response relationship cannot be discerned.…”

Section: Discussionmentioning

confidence: 90%

“…From the available studies that have reported initial and terminal training intensity and duration, we estimated that a progression in treadmill speed of ∼1 m·min -1 ·day -1 may be achievable (Mokelke et al 1997;Eddington et al 1998;Fiebig et al 1998;Demirel et al 1999;Noble et al 1999;Braga et al 2000;González et al 2000;Machida et al 2000;Jew and Moore 2002;Jafari et al 2005;Peres et al 2005;Yang et al 2006;GhanbariNiaki et al 2007;Leandro et al 2007;Mueller 2007;Harris et al 2008;Vichaiwong et al 2009;Eynan et al 2010). The mean daily increase in treadmill speed was between 0.6 and 0.8 m·min -1 ·day -1 in the mild-, moderate-, and heavy-intensity trained rodents.…”

Section: Non-interval-based Trainingmentioning

confidence: 95%

See 1 more Smart Citation

A prospective evaluation of non-interval- and interval-based exercise training progressions in rodents

Jendzjowsky

DeLorey

2011

Appl. Physiol. Nutr. Metab.

View full text Add to dashboard Cite

Non-interval and interval training progressions were used to determine (i) the mean rate at which treadmill speed could be incremented daily using a non-interval training progression to train rats to run continuously at different intensities and (ii) the number of training days required for rats to run continuously at different exercise intensities with non-interval- and interval-based training progressions to establish methods of progressive overload for rodent exercise training studies. Rats were randomly assigned to mild-intensity (n = 5, 20 m·min(-1), 5% grade), moderate-intensity (n = 5, 30 m·min(-1), 5% grade), and heavy-intensity non-interval groups (n = 5, 40 m·min(-1), 5% grade) or a heavy-intensity interval (n = 5, 40 m·min(-1), 5% grade) group and ran 5 days·week(-1) for 6 weeks. Non-interval training involved a daily increase of treadmill speed, whereas interval training involved a daily increase of interval time, until the animal could run continuously at a prescribed intensity. In mild-, moderate-, and heavy-intensity non-interval-trained rats, treadmill speed was increased by 0.6 ± 0.7 m·min(-1)·day(-1), 0.6 ± 0.2 m·min(-1)·day(-1), and 0.8 ± 0.1 m·min(-1)·day(-1), respectively. Target training intensity and duration were obtained following 0.4 ± 0.5 days, 17 ± 3 days, and 23 ± 3 training days (p < 0.05) in mild-, moderate-, and heavy-intensity groups, respectively. In contrast, interval-trained rodents required 11 ± 1 training days. These data demonstrate that rodents will tolerate an increase in treadmill speed of ∼0.7 ± 0.1 m·min(-1)·day(-1) and that this progression enables rats to run continuously at moderate and heavy intensities with 3-4 weeks of progressive overload. Interval training significantly reduces the number of training days required to attain a target intensity.

show abstract

Section: Discussionmentioning

confidence: 90%

Section: Non-interval-based Trainingmentioning

confidence: 95%

A prospective evaluation of non-interval- and interval-based exercise training progressions in rodents

Jendzjowsky

DeLorey

2011

Appl. Physiol. Nutr. Metab.

View full text Add to dashboard Cite

show abstract

“…Preexposure to HBO did not affect the submaximal heart rate (HR) or HR max (47,59,75) nor did it affect V E , blood lactate concentration, lactate threshold, ventilation threshold, or ventilatory equivalent for oxygen (10,27,59,75). In human studies, the RER was not affected by preexposure to HBO (10,75); however, the RER was decreased in trained but increased in sedentary rats (19). Using near-infrared spectroscopy (NIRS), Kawada et al (33) showed an improvement in muscle oxygenation, which is in contrast to the study of Webster et al (75) who failed to show any improvement in muscle oxygenation as assessed by NIRS.…”

Section: Resultsmentioning

confidence: 99%

“…Indeed, Hodges et al (27) showed a decrease in the transcutaneous pO 2 in the lower limb already 10 minutes after finishing the HBO treatment, reaching values even lower than before HBO and speculated that this drop might either reflect the effect of tissue autoregulation or the vasoconstrictive effect of high pO 2 . Interestingly, although the exposure to HBO in different studies lasted between 50 minutes (33) to up to 6 hours (19), no significant ergogenic effects were found (19,27,33,44,47,59,75), addressing the need to more thoroughly investigate effects of HBO on tissue oxygenation. There is only 1 available study, performed by Čabrić et al (10), that did prove ergogenic effects of HBO treatment, namely, a higher V̇ o 2 max and higher velocity on a treadmill, persisting as long as 3 hours after 60-minute exposure to HBO at 2.8 ATA.…”

Section: Discussionmentioning

confidence: 99%

Does Hyperbaric Oxygenation Improve Athletic Performance?

Šet¹,

Lenasi²

2022

Journal of Strength and Conditioning Research

View full text Add to dashboard Cite

Šet, V, and Lenasi, H. Does hyperbaric oxygenation improve athletic performance? J Strength Cond Res 37(2): 482–493, 2023—Hyperbaric oxygen (HBO) has been suggested to affect oxygen availability and performance, and delay the onset of fatigue. Many mechanisms of HBO-induced alterations have been proposed, including modulation of various metabolic pathways, and the antioxidant defense mechanisms. As exercise per se affects similar aspects, it is tempting to speculate that simultaneous application of both, exercise and HBO might have synergistic effects. The aim of this review was to search through the currently available literature and evaluate the effect of acute exposure to HBO on exercise performance, potential effects of a combination of HBO and physical training, and to elucidate some possible mechanisms behind. We conducted searches in the PubMed and Scopus databases (search term: “hyperbaric” AND “oxygen” AND “exercise”) and in relevant hyperbaric textbook and assessed potentially eligible full texts for details. Meta-analysis could not be performed because of a few available and rather heterogeneous studies. Twenty-seven studies were included in the final assessment (14 on exercise during HBO, 9 on exercise following HBO, 4 on applying HBO during recovery and rest between exercise bouts, and 3 on a combination of HBO and training). The results are contradictory, showing either positive or none ergogenic effects. There is some risk of bias and placebo effect. Discrepant findings of the available studies might partly be explained by different protocols applied, both regarding HBO and exercise intensity and regimen. There is a need for further research with well-designed trials to evaluate the effect of HBO on performance before recommending it to routine use in athletes.

show abstract

“…Although the beneficial effects of hyperoxic gas administration during exercise are well documented (Wilson & Welch 1975, Tucker et al. 2007), the potential ergogenic action of pre‐exposure to O 2 to subsequent physical performance is doubtful (Eynan et al. 2010, Sperlich et al.…”

mentioning

confidence: 99%

Carbon monoxide exposure during exercise performance: muscle and cerebral oxygenation

et al. 2011

View full text Add to dashboard Cite

show abstract

Energetic Efficiency in Trained and Sedentary Rats After Exposure to Normobaric and Hyperbaric Oxygen

Abstract: Our results suggest that exposure to 100% normobaric oxygen for 24 h and HBO at 2 ATA for 4 h induces a reduction in the energetic efficiency of trained rats, but improves energetic efficiency in sedentary rats.

Cited by 4 publications

References 0 publications

A prospective evaluation of non-interval- and interval-based exercise training progressions in rodents

A prospective evaluation of non-interval- and interval-based exercise training progressions in rodents

Does Hyperbaric Oxygenation Improve Athletic Performance?

Carbon monoxide exposure during exercise performance: muscle and cerebral oxygenation

Contact Info

Product

Resources

About