The maximal lipid oxidation rates in spinal cord injury patients with different exercise intensities / 中国康复医学杂志

ABSTRACT

Objective:To observe the lipid oxidation rates in spinal cord injury (SCI) patients with different exercise intensities.Method:Thirty sedentary patients with SCI were selected to perform incremental exercise load tests (baseline test and Fatmax test) with upper limb power vehicle.Meanwhile,both tests included respiratory gas analysis.In baseline tests,the workload was started at 5W and increased by 10W every 3 min,with 60 rmp until patients exhausted.The Fatmax test included 5 stages of workload and every stage kept 6 min.The initial workload was 5W,the fifth workload was corresponded to the load when respiratory quotient was 1 in the baseline test,the other workload was set according to the average of the initial and fifth workload.All lipid oxidation rates were measured by oxygen uptake (VO2) and respiratory quotient (RQ) in the tests.Result:With the increase of exercise intensity,lipid oxidation rates in SCI patients increased at first and then decreased.The peak of lipid oxidation rates (5.46±0.75 μmol/kg/min) arrived at the intensities of 34.9％±2.3％ VO2 peak.After that the lipid oxidation rates decreased significantly as 3.92±0.69,2.85±0.61,0.58±0.19 μmol/kg/min at 41.83±2.18,52.29±1.73 and 61.32±1.98％ VO.2 peak accordingly(P＜0.05).Conclusion:During the rehabilitation of SCI patients,we should pay attention to the intervention from low intensity exercise to maximize lipid oxidation rates,reducing the incidence of obesity in SCI patients.