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Showing 3 results for Rating of Perceived Exertion

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Volume 10, Issue 3 (6-2012)
Abstract

The purpose of this study was to investigate the effects of using upper (Bench press) and lower body (Leg curl) exercise during rest interval on rating of perceived exertion (RPE), lactate production and quantity of lower body performance (Leg extension) with 75% 1RM (repetition maximum). 15 resistance trained men (age 20.9±1.9 years, height 175.6 ±4.5 cm and weight 74.8±5.2 kg) took part in four testing sessions with 48 hours recovery between sessions voluntarily. subjects completed randomly exercises during per session one models of leg extension exercise with inactive rest (L1), leg extension exercise with bench press and inactive rest (L2), and leg extension movement with leg curl and inactive rest of 3 min (L3) up to voluntary exhaustion. RPE and Lactate were measured before and after different exercises. For statistical analysis of data, two-way repeated measures and LSD post hoc tests were used. The result showed that all of three exercise models reduced the repetitions in continuous sets specially L2 model, and there were significant differences between sets (P<0.05). Also, there was significant difference between sustainability of repetitions in L2, L3 and L1, L3 exercise models (P<0.05). Also, there was significant difference between lactate production in L2, L3 and L1, L3 and RPE in all exercise models specially L2 model as positive difference (P<0.05). Therefore, it seems that use of combined exercise models, specially combined lower and upper body exercise, not only reduced all times of workout, but also attenuates rating of perceived exertion and lactate production, and maintains quantity of repetitions.


Javid Shah Hosseini, Arezoo Eskandari, Mohamad Fashi,
Volume 21, Issue 26 (12-2023)
Abstract

Using standard tests to assess maximum strength is very important where resistance training planning is based individually. This study aimed to estimate 1 repetition maximum of active women based on the Rating of Perceived and to provide a special predictive equation. 30 healthy women (20-35 years; BMI: 26.32 ± 3.34 kg/m2) performed one repetition of chest press with eyes close and then chose a number to determine the intensity by Rating of Perceived Exertion scale of 6-20. In order to evaluate the validity of the designed equation, one repetition of the maximum number of subjects was calculated by Brzycki equation, and correlation was determined by Pearson's correlation method. There was a high correlation between the present study equation and the Brzycki method (r=0.89) and also after cross validations (r=0.91). No significant difference was observed between the results of the present equation and the results of Berzyski's equation. It seems that the equation of the present study” 1RM={(20-RPE" /" 40) +1 }× weight/2 "  can provide a reliable estimate for 1 repetition maximum of chest press in healthy women.
Hamidreza Barzegarpoor, Hamid Rajabi, Saied Mohammadi, Rana Fayazmilani,
Volume 22, Issue 27 (8-2024)
Abstract

Performing a mental exertion before and during an exercise increase fatigue indices. One of the important factors in inducing fatigue indices is the type of mental effort engaged. So, the purpose of the present study is comparing the effects of performing types of mental exertion during cycling exercise on fatigue indicators. Methods: 10 cyclist men (with average age 34.5 ± 4.5 kg, height 177 ± 4.5cm, peak power output 236 ± 36 W) invited for 5 different sessions. In the first session, anthropometric characteristics and of cycling peak power output have determined. In the next four sessions, cycling for 45-min at 65% PPO on the cycle ergometer with (Stroop, AX-CPT and PVT) or without (watching a movie) mental exertion. Rate of perceived exertion and heart rate were recorded while cycling every 10 min and cortisol concentration was measured before and 30 min after exercise finished. Two-way repeated-measures ANOVAs were used to analyzing data. Results: Performing 45 minutes of Stroop mental exertion during cycling exercise increased effort perception, mental demand in the NASA questionnaire, and cortisol concentration compared to cycling exercise alone (P˂0/05) but there is no differences between AX-CPT and PVT to cycling exercise alone . Conclusion: The results of present study showed that performing different mental effort simultaneously with the cycling exercise depending on the amount of challenge and their duration may affect some of the fatigue indices.


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