Impact of deep water running in interval training (DWR-IT) on body composition, functional capacity, and quality of life in overweight adults: study protocol for a randomized controlled trial.

BACKGROUND: Interval training in deep water running (DWR-IT) is a training method to improve cardiovascular fitness, functional health, and quality of life and to help control body weight. Its main advantages are the reduction of joint overload and a low risk of musculoskeletal injuries. The aim of the study is to investigate the influence of DWR-IT on functional capacity, body composition, and quality of life of overweight middle-aged adults. METHODS: This is a randomized controlled, two-arm, open, parallel clinical trial with overweight adults. Volunteers will be allocated to a water group (WG), which will be submitted to the intervention, or a control group, which will not be subjected to any kind of intervention. The evaluation will be composed of anamnesis, electrical bioimpedance, six-minute walk test (6MWT), questionnaire on the Impact of Weight on Quality of Life-lite (IWQOL-LITE), Pittsburgh Sleep Quality Index, Epworth Sleepiness Scale, chair stand test, arm curl test, and food frequency questionnaire. The DWR-IT will last for 12 weeks, systematically increasing the intensity and training volume. DISCUSSION: The objective of this clinical trial is to evaluate the effect of DWR-IT on overweight adults. The study is guided through practice based on scientific evidence for the use of training and aquatic rehabilitation. It is expected that after 12 weeks of aquatic intervention there will be a decrease in body fat by about 10%, evaluated by electrical bioimpedance, an increase of about 25% of cardiorespiratory endurance, evaluated by 6MWT, and an improvement of about 25% of physical function domains, self-esteem, distress in public places, and work, analyzed by IWQOL-LITE in the WG. TRIAL REGISTRATION: The study protocol was published in the Brazilian Registry of Clinical Trials (ReBEC) on June 16, 2016. Registration number: RBR-6dmh7d.

Respostas agudas glicêmicas e cardiovasculares do Deep Water Running em mulheres obesas / Glycemic and cardiovascular acute responses of Deep Water Running in obese women

Introdução: Deep Water Running no sistema de treinamento intervalado (DWR-STI) é um método de treinamento e reabilitação física que pode contribuir para o controle dos fatores de risco da obesidade. Objetivo: investigar as respostas agudas imediatas pós-sessão de DWR-STI na glicemia capilar, pressão arterial (PA) e frequência cardíaca (FC) em mulheres obesas. Métodos: participaram 14 voluntárias obesas, com idade de 50,28 ± 4,24 anos. Foram realizados testes da glicemia capilar, medidas da PA e FC pré e pós-sessão de DWR-STI. Resultados: houve diferença nos valores da glicemia capilar pré e pós-sessão (de 102,36 ± 27,19 mg/dl para 84,64 ± 10,48 mg/dl). Conclusão: conclui-se que uma sessão de DWR-STI reduz a glicemia capilar em mulheres obesas. Contudo, ainda são necessários mais estudos para tentar desvendar os mecanismos e as respostas fisiológicas agudas imediatas do DWR-STI nas variáveis cardiovasculares e na glicemia capilar.

Introduction: Deep Water Running in the interval training system (DWR-ITS) is a method of training and physical rehabilitation that can contribute to the control of the risk factors of obesity. Objective: investigate the immediate post-session DWR-ITS acute responses in capillary glycemia, blood pressure (BP) and heart rate (HR) in obese women. Methods: participants were 14 obese volunteers, aged 50.28 ± 4.24 years. Capillary glycemia tests were performed, measurements of BP and HR pre and post-session of DWR-ITS. Results: there was a difference in pre and post-session capillary glycemia values (from 102.36 ± 27.19 mg/dl to 84.64 ± 10.48 mg/ dl). Conclusion: it is concluded that a DWR-STI session reduces capillary glycemia in obese women. However, further studies are needed to better understand the mechanisms of physiological immediate responses after DWR-STI in cardiovascular and capillary glycemia variables.