Medicine & Science in Sports & Exercise:
D-28 Free Communication/Poster - Fitness Testing: MAY 28, 2009 1:00 PM - 6:00 PM ROOM: Hall 4F
1University of Study "Foro Italico", Rome, Italy. 2Catholic University of Sacred Heart, Rome, Italy. (Sponsor: Prof. Fredric Goss, FACSM)
(No relationships reported)
The Joba® Core Trainer (JOBA) is an ergometric device which simulates horseback riding. The computer-driven saddle reproduces all components of horse movements, except vertical displacement. Based on the counterbalance principle, it efficiently engages trunk and thigh muscles. Previous research showed that JOBA enhances glycemic control in diabetic patients and reduces pain and disability in subjects with chronic low back pain. However, no data are available about the cardiopulmonary responses elicited by JOBA.
PURPOSE: To describe the cardiopulmonary responses induced by using JOBA at different speeds.
METHODS: Twenty healthy subjects (11 men, 9 women) were investigated (age 54.8±11.8 yrs). ECG and respiratory gas exchange were measured during a training session with JOBA (3 min warm-up, 5 steps of 7 min of duration each with speed increasing from lowest to highest, 3 min cool down). The following day an incremental, cardiopulmonary stress test was carried out on a cycle ergometer to determine peak aerobic power and ventilatory threshold (VT) by means of the V-slope method.
RESULTS: Heart rate (HR) and oxygen consumption (VO2) did not differ among speeds (from 82.7±13.2 beats/min at speed 1 to 87.0±9.7 at speed 9, n.s., and from 4.2±1.2 ml/kg/min to 4.9±1.5, n.s., respectively). Respiratory Exchange Ratio remained unchanged across different speeds of exercise (from 0.9±0.1 to 1.0±0.2, n.s.). HR and VO2 were also expressed as a percentage of their respective VT values: HR increased from 78.7±13.9 % of VT at the lowest exercise intensity to 83.3±15.5 at the highest (n.s.), while VO2 raised from 33.6±8.6 to 38.8±11.3 (n.s.). Eventually, at the highest speed, HR reached 65.5±11.4% of peak HR and VO2 20.8±5.6% of peak VO2 (n.s. vs. lowest speed).
CONCLUSIONS: Training with JOBA at increasing speeds resulted in a slight modification of cardiopulmonary parameters. Even at the highest speed, HR and VO2 remained well below the values measured at the VT. Thus, JOBA may be a safe alternative to usual ergometers in the rehabilitation process of subjects with severely reduced exercise tolerance, such as frail elderly, patients with heart failure, cardiac transplant, and severe obstructive pulmonary disease. Further studies are needed to describe the cardiopulmonary responses to JOBA of patients in these clinical subgroups.