High-Intensity Intermittent Exercise and Autonomic Modulation: Effects of Different Volume Sessions.

The aim of this study was to compare heart rate variability (HRV) recovery after 2 sessions of high-intensity intermittent exercise at different volumes (1.25 km [HIIE1.25] and 2.5 km [HIIE2.5]). 13 participants determined their maximal aerobic speed (MAS) and completed 2 HIIE (1:1 at 100% MAS) trials. The heart rate was recorded before and after each session. HRV indicators were calculated according to time (RMSSD and SDNN) and frequency (LF, HF and LF/HF ratio) domains. SDNN and RMSSD presented effect of test (F=20.97; p<0.01 and F=21.00; p<0.01, respectively) and moment (F=6.76; p<0.01 and F=12.30; p<0.01, respectively), without interaction. Even though we did not find an interaction effect for any HRV variables, the HIIE2.5 presented a delay of only 5 min in HRV recovery, when compared to HIIE1.25. However, the effects of the test (SDNN, RMSSD, LF-log, and HF-log) indicate higher autonomic stress during the entire recovery period. These findings may indicate that exercise volume interferes with HRV recovery. If so, physically active subjects may choose a lower volume exercise (i. e., HIIE1.25) in order to promote similar physical fitness adaptations with lower loading on autonomic modulation.

Effects of a new approach of aerobic interval training on cardiac autonomic modulation and cardiovascular parameters of metabolic syndrome subjects.

OBJECTIVE: To evaluate the effects of 16 weeks of periodized aerobic interval training (AIT) on cardiac autonomic modulation and cardiovascular parameters of metabolic syndrome (Mets) individuals. SUBJECTS AND METHODS: The sample was composed of 52 subjects with a diagnosis of Mets, allocated into two groups: AIT (AITG; n = 26) and control (CG; n = 26). The AITG was submitted to a periodized AIT program, over 16 weeks, while CG was not submitted to any training program. To evaluate the autonomic modulation and cardiovascular parameters in both groups, heart rate variability (HRV) indices, blood pressure (BP), and heart rate (HR) were measured at the beginning and end of the training. RESULTS: Statistically significant differences were not observed in HFms2 (high frequency in milisseconds), LFnu (low frequency in normality unit), HFnu (high frequency in normality unit), and LF/HF ratio indices, or in the cardiovascular parameters BP and HR when comparing the AITG with the CG. However, significant increases in rMSSD (root-means square differences of successive R-R intervals), LFms2 (low frequency in milliseconds), and SDNN (standard deviation of normal to normal intervals) were observed in the AITG. CONCLUSION: Periodized AIT promoted positive effects on autonomic modulation of Mets subjects, characterized by an increase in the parasympathetic, sympathetic, and global modulation of this population. Additionally, cardiovascular parameter alterations were not observed in Mets subjects submitted to periodized AIT.

Effects of a new approach of aerobic interval training on cardiac autonomic modulation and cardiovascular parameters of metabolic syndrome subjects

ABSTRACT Objective: To evaluate the effects of 16 weeks of periodized aerobic interval training (AIT) on cardiac autonomic modulation and cardiovascular parameters of metabolic syndrome (Mets) individuals. Subjects and methods: The sample was composed of 52 subjects with a diagnosis of Mets, allocated into two groups: AIT (AITG; n = 26) and control (CG; n = 26). The AITG was submitted to a periodized AIT program, over 16 weeks, while CG was not submitted to any training program. To evaluate the autonomic modulation and cardiovascular parameters in both groups, heart rate variability (HRV) indices, blood pressure (BP), and heart rate (HR) were measured at the beginning and end of the training. Results: Statistically significant differences were not observed in HFms2 (high frequency in milisseconds), LFnu (low frequency in normality unit), HFnu (high frequency in normality unit), and LF/HF ratio indices, or in the cardiovascular parameters BP and HR when comparing the AITG with the CG. However, significant increases in rMSSD (root-means square differences of successive R-R intervals), LFms2 (low frequency in milliseconds), and SDNN (standard deviation of normal to normal intervals) were observed in the AITG. Conclusion: Periodized AIT promoted positive effects on autonomic modulation of Mets subjects, characterized by an increase in the parasympathetic, sympathetic, and global modulation of this population. Additionally, cardiovascular parameter alterations were not observed in Mets subjects submitted to periodized AIT.

Lesões musculares em atletas do sexo masculino atendidos no Centro de Estudos e Atendimento em Fisioterapia de Presidente Prudente - SP / Muscle injuries in male athletes at the Center of Studies and Physiotherapy Services of Presidente Prudente - SP / Lesiones musculares en atletas de sexo masculino atendidos en el Centro de Estudios y Atención en Fisioterapia de Presidente Prudente - SP

Resumo Objetivou-se caracterizar e determinar a frequência de lesões musculares (LM) de atletas atendidos em uma clínica universitária de fisioterapia. Foram feitas análises de prontuários e caracterizaram-se dados antropométricos, locais anatômicos, tratamentos usados, dentre outros. Foram identificados 47 casos de LM, distribuídas em grau I (n = 13) e grau II (n = 34). O segmento coxa foi o local anatômico mais acometido com 63,1% (p < 0,05) e 85,7% (p < 0,01) para modalidades coletivas e individuais, respectivamente. Aproximadamente 75% dos casos apresentaram alta por retorno ao esporte, onde observa-se terapias convencional (95,7%) e manual (70,2) os tratamentos mais frequentes. Conclui-se que LM acometem predominantemente o segmento coxa posterior, independentemente da modalidade esportiva e os tratamentos usados demonstraram-se efetivos no retorno ao esporte.

Abstract This study aimed to characterize and determine the frequency of muscle injuries (MI) in athletes assisted in a university service center in physical therapy. Analysis of medical records were made, characterizing anthropometric data, anatomic spots, treatments, among others. Forty-seven cases were identified, distributed in grade I (n=13) and grade II (n=34). The thigh segment was the anatomic spot with the higher prevalence, with 63.1% (p<0.05) and 85.7% (p<0.01) for collective and individual sports, respectively. The rate of return to sports was about 75%, in which conventional therapies (95,7%) and manual (70.2%) were the most common treatments. Thus, we conclude that MI predominantly affects the anatomical thigh segment, regardless of the sport, and that physiotherapy interventions used were effective to return to sports.

Resumen El objetivo de este estudio fue definir y determinar la frecuencia de las lesiones musculares (LM) de atletas atendidos en una clínica universitaria de fisioterapia. Se realizó un análisis de los registros, definición de datos antropométricos, espacios anatómicos y tratamientos utilizados, entre otros. Se identificaron 47 casos de LM, distribuidas en grado I (n = 13) y grado II (n = 34). El segmento del muslo fue el espacio anatómico más afectado con el 63,1% (p <0,05) y el 85,7% (p <0,01) en el caso de deportes colectivos e individuales, respectivamente. Hubo un 74,46% de altas para la vuelta a la práctica deportiva y se encontró que los tratamientos más frecuentes fueron las terapias convencionales (95,7%) y manuales (70,2%). Se concluye que las lesiones musculares afectan predominantemente al muslo, independientemente del tipo de deporte, y que los tratamientos utilizados fueron efectivos para la vuelta a la práctica deportiva.