scholarly journals Effects of inspiratory muscle training versus high intensity interval training on the recovery capacity after a maximal dynamic apnoea in breath-hold divers. A randomised crossover trial

2020 ◽  
Vol 50 (4) ◽  
pp. 318-324
Author(s):  
Francisco de Asís-Fernández ◽  
◽  
Tamara del Corral ◽  
Ibai López-de-Uralde-Villanueva ◽  
◽  
...  
Keyword(s):  
High Intensity ◽  
Recovery Time ◽  
Heart Rate Recovery ◽  
Interval Training ◽  
Inspiratory Muscle ◽  
Breath Hold ◽  
High Intensity Interval Training ◽  
Muscle Training ◽  
Recovery Capacity ◽  
High Intensity Interval

(de Asís-Fernández F, del Corral T, López-de-Uralde-Villanueva I. Effects of inspiratory muscle training versus high intensity interval training on the recovery capacity after a maximal dynamic apnoea in breath-hold divers. A randomised crossover trial. Diving and Hyperbaric Medicine. 2020 December 20;50(4):318–324. doi: 10.28920/dhm50.4.318-324. PMID: 33325010.) Introduction: After a maximal apnoea, breath-hold divers must restore O2 levels and clear CO2 and lactic acid produced. High intensity interval training (HIIT) and inspiratory muscle training (IMT) could be employed with the aim of increasing recovery capacity. This study aimed to evaluate the relative effects of IMT versus HIIT on recovery of peripheral oxygen saturation (SpO2), and also on pulmonary function, inspiratory muscle strength, lactate and heart rate recovery after a maximal dynamic apnoea in breath-hold divers. Methods: Fifteen breath-hold divers performed two training interventions (IMT and HIIT) for 20 min, three days per week over four weeks in randomised order with a two week washout period. Results: IMT produced a > 3 s reduction in SpO2 recovery time compared to HIIT. The forced expiratory volume in the first second (FEV1) and maximum inspiratory pressure (MIP) were significantly increased in the IMT group compared to HIIT. The magnitude of these differences in favour of IMT was large in both cases. Neither training intervention was superior to the other for heart rate recovery time, nor in peak- and recovery- lactate. Conclusions: IMT produced a reduction in SpO2 recovery time compared to HIIT after maximal dynamic apnoea. Even a 3 s improvement in recovery could be important in scenarios like underwater hockey where repetitive apnoeas during high levels of exercise are separated by only seconds. IMT also improved FEV1 and MIP, but no differences in lactate and heart rate recovery were found post-apnoea between HIIT and IMT.

scholarly journals A flow resistive inspiratory muscle training mask worn during high-intensity interval training does not improve 5 km running time-trial performance

2020 ◽  
Author(s):  
Mark A. Faghy ◽  
Peter I. Brown ◽  
Nicola M. Davis ◽  
J. P. Mayes ◽  
Tom M. Maden-Wilkinson
Keyword(s):  
High Intensity ◽  
Time Trial ◽  
Interval Training ◽  
Inspiratory Muscle ◽  
Inspiratory Muscle Training ◽  
High Intensity Interval Training ◽  
Muscle Training ◽  
Time Trial Performance ◽  
High Intensity Interval ◽  
Trial Performance

Abstract Purpose There is little evidence of the ergogenic effect of flow-resistive masks worn during exercise. We compared a flow-resistive face mask (MASK) worn during high-intensity interval training (HIIT) against pressure threshold loading inspiratory muscle training (IMT). Methods 23 participants (13 males) completed a 5 km time trial and six weeks of HIIT (3 sessions weekly). HIIT (n = 8) consisted of repeated work (2 min) at the speed equivalent to 95% $${\dot{\text{V}}}$$ V ˙ O2 peak with equal rest. Repetitions were incremental (six in weeks 1, 2 and 6, eight in weeks 3 and 4 and ten in week 5). Participants were allocated to one of three training groups. MASK (n = 8) wore a flow-resistive mask during all sessions. The IMT group (n = 8) completed 2 × 30 breaths daily at 50% maximum inspiratory pressure (PImax). A control group (CON, n = 7) completed HIIT only. Following HIIT, participants completed two 5 km time trials, the first matched identically to pre-intervention trial (ISO time), and a self-paced effort. Results Time trial performance was improved in all groups (MASK 3.1 ± 1.7%, IMT, 5.7 ± 1.5% and CON 2.6 ± 1.0%, p < 0.05). IMT improved greater than MASK and CON (p = 0.004). Post intervention, PImax and diaphragm thickness were improved in IMT only (32% and 9.5%, respectively, p = 0.003 and 0.024). Conclusion A flow-resistive mask worn during HIIT provides no benefit to 5 km performance when compared to HIIT only. Supplementing HIIT with IMT improves respiratory muscle strength, morphology and performance greater than HIIT alone.

scholarly journals Shorter recovery time following high-intensity interval training induced higher body fat loss among overweight women

2018 ◽  
Vol 15 (1) ◽  
pp. 157-165 ◽  
Author(s):  
Seyed Javad Mirghani ◽  
Mehdi Seydyousefi ◽  
Satu Pekkala ◽  
Shohreh Sharifian ◽  
Gheysar Beyshami
Keyword(s):  
Body Fat ◽  
High Intensity ◽  
Recovery Time ◽  
Interval Training ◽  
High Intensity Interval Training ◽  
Fat Loss ◽  
Overweight Women ◽  
High Intensity Interval

Standardized Versus Customized High-Intensity Training: Effects on Cycling Performance

2014 ◽  
Vol 9 (2) ◽  
pp. 292-301 ◽  
Author(s):  
Benoit Capostagno ◽  
Michael I. Lambert ◽  
Robert P. Lamberts
Keyword(s):  
High Intensity ◽  
Heart Rate Recovery ◽  
Time Trial ◽  
Interval Training ◽  
Training Group ◽  
Cycling Performance ◽  
High Intensity Interval Training ◽  
High Intensity Training ◽  
High Intensity Interval ◽  
Intensity Training

Purpose:To determine whether a submaximal cycling test could be used to monitor and prescribe high-intensity interval training (HIT).Methods:Two groups of male cyclists completed 4 HIT sessions over a 2-wk period. The structured-training group (SG; n = 8, VO2max = 58.4 ± 4.2 mL · min−1 · kg−1) followed a predetermined training program while the flexible-training group (FG; n = 7, VO2max = 53.9 ± 5.0 mL · min−1 · kg−1) had the timing of their HIT sessions prescribed based on the data of the Lamberts and Lambert Submaximal Cycle Test (LSCT).Results:Effect-size calculations showed large differences in the improvements in 40-km time-trial performance after the HIT training between SG (8 ± 45 s) and FG (48 ± 42 s). Heart-rate recovery, monitored during the study, tended to increase in FG and remain unchanged in SG.Conclusions:The results of the current study suggest that the LSCT may be a useful tool for coaches to monitor and prescribe HIT.

Effects of interval training on risk markers for arrhythmic death: a randomized controlled trial

2019 ◽  
Vol 33 (8) ◽  
pp. 1320-1330 ◽  
Author(s):  
Maxime Boidin ◽  
Mathieu Gayda ◽  
Christine Henri ◽  
Doug Hayami ◽  
Lukas D Trachsel ◽  
...  
Keyword(s):  
Heart Rate ◽  
Acute Coronary Syndrome ◽  
High Intensity ◽  
Heart Rate Recovery ◽  
Interval Training ◽  
Moderate Intensity ◽  
High Intensity Interval Training ◽  
Continuous Training ◽  
Coronary Syndrome ◽  
High Intensity Interval

Objective: To compare the effects of high-intensity interval training versus moderate-intensity continuous training on risk markers of arrhythmic death in patients who recently suffered from an acute coronary syndrome. Design: Double-blind (patient and evaluator) randomized controlled trial. Setting: Cardiovascular Prevention and Rehabilitation Centre (EPIC Centre) of the Montreal Heart Institute, Montreal, Canada. Subjects: A total of 43 patients were randomized following an acute coronary syndrome. Interventions: Patients were assigned to either high-intensity interval training (n = 18) or isocaloric moderate-intensity continuous training (n = 19), three times a week for a total of 36 sessions. Main measures: Heart rate recovery for 5 minutes, heart rate variability for 24 hours, occurrence of ventricular arrhythmias, and QT dispersion were measured before and after the 36 sessions of training. Results: Among the 43 patients randomized, 6 participants in the high-intensity interval training group stopped training for reasons unrelated to exercise training and were excluded from the analyses. Heart rate recovery improved solely in the high-intensity interval training group, particularly at the end of recovery period ( p < 0.05). There were no differences in heart rate variability, occurrence of ventricular arrhythmias, or QT dispersion parameters between the groups at study end. Conclusion: Despite the lack of power to detect any large difference between the two interventions with respect to risk markers of arrhythmic death, high-intensity interval training appears safe and may be more effective at improving heart rate recovery relative to moderate-intensity continuous training in our patients following acute coronary syndrome.

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