Proposal on Calculation of Ventilation Threshold Using Non-contact Respiration Measurement with Pattern Light Projection

This study investigated the retention of strength gained after resistance training, while performing aerobic endurance training. Following a 10-week resistance training program (three times a week) that included maintenance aerobic endurance training (twice a week), 18 varsity oarswomen were matched on strength and randomly assigned to two groups: Group 1 performed maintenance resistance training once a week and Group 2 performed resistance training twice a week. Both groups performed endurance training four times a week during the 6-week maintenance resistance training program. There was a significant increase in strength (multiple-RM test) for three upper and three lower body exercises after the initial 10-week resistance training program. A further significant increase in two exercises (inclined leg press and knee flexion) were observed after 6 weeks of maintenance resistance training and endurance training in both groups. No further significant increases were observed in the four other exercises during maintenance strength training. These latter findings occurred at the same time that VO2max and ventilation threshold increased. These results suggest that strength gains can be maintained with resistance training once or twice a week while focusing on improving aerobic endurance performance without compromising the latter. Key words: repetition maximum, ventilation threshold, endurance performance

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The Time Course of Oxygen Uptake, Aerobic Capacity and Emg during Two Months of Moderate Interval Endurance Training (A Case Study)

Baltic Journal of Sport and Health Sciences ◽

10.33607/bjshs.v4i91.176 ◽

2018 ◽

Vol 4 (91) ◽

Author(s):

Sandra Raubaitė ◽

Neringa Baranauskienė ◽

Arvydas Stasiulis

Keyword(s):

Body Composition ◽

Oxygen Uptake ◽

Endurance Training ◽

Root Mean Square ◽

Aerobic Capacity ◽

Time Course ◽

Oxygen Uptake Kinetics ◽

Moderate Intensity ◽

Mean Square ◽

Ventilation Threshold

Research background and hypothesis. The low-moderate-intensity continuous endurance training improved body composition, aerobic capacity and overall health-related parameters in healthy persons. However, we could not find publications about the effect of moderate interval aerobic endurance training (IET) on body composition, 2 OV& kinetics, aerobic capacity and EMG parameters. Research aim. The main purpose of this study was to examine the effect of interval endurance training (IET) on oxygen uptake kinetics, aerobic capacity, body composition and EMG parameters. Research methods. A 26-year-old, sedentary obese female (stature – 1.80 m; weight – 99.2 kg; VO 2 max – 37.2 ml/kg -1 /min -1 ) was involved in two-month moderate interval endurance training (IET). The subject performed three training sessions a week separated by one or two days of rest. The initial intensity of training was 90% of the first ventilation threshold (VT1). The VT1 and second ventilation threshold (VT2) ware estimated after completion of incremental running test until exhaustion on a LE 200 CE treadmill (VIASYS, Germany). Research results. We determined that after two months IET subject’ body mass decreased by 10%, the training had an effect on aerobic capacity parameters as well. The running speed at VT1 and VT2 increased by 8.1% and 10.2% respectively after the two-month IET programme. The heart rate (165.9 beats/min -1 ) and oxygen uptake (2.583 l/min -1 ) significantly decreased respectively (150.4 beats/min -1 ) (2.285 l/min -1 ) after IET period compared with pre-training testing. To indicate the total muscle activity we measured integrated EMG (iEMG) and root mean square (RMS). We also determined changes on EMG parameters after four, six and eight weeks IET.Discussion and conclusions. Two-month moderate interval endurance training has significant effect on aerobic capacity, anthropometrics, EMG parameters and VO 2 kinetics.Keywords: ventilatory thresholds, maximal oxygen uptake, EMG root mean square.

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