The Effect Of Acute Exercise On Craving And Inducing Factors Among Heroin Dependent Individuals

How to reduce the risk of relapse of heroin addicts is a problem to be solved.It had been found that aerobic exercise can reduce the heroin craving.And resistance exercise may be another way to reduce the heroin craving.Therefore,the purpose of this paper is to determine the effect of acute resistance exercise on craving among heroin dependent individuals.The first study: To determine the dose-response relationships between resistance exercise intensity and heroin cravings,emotional status,attentional bias and executive functions in heroin dependent individuals.Method: The randomized controlled trial design was used.104 male individuals with heroin dependent(aged 35.36 ± 4.47years)were recruited.The participants were randomly assigned to four groups: low intensity group(30%-35%1-RM),moderate intensity group(55%-60%1-RM),high intensity group(75%-80%1-RM)and control group.The participants then tested the craving,emotional status,attentional bias and executive functions during pre-and post-exercise.Results: The change in cravings of the high intensity group was more than that of the other three groups during exercise,immediately after exercise and 40 minutes after exercise;The change of Happy and excited(HE)scores in high intensity group and moderate intensity group were significantly greater than that in control group immediately after exercise;Compared with the control group,the scores of attentional bias in high intensity group and moderate intensity group had significantly greater changes after exercise.Compared with the control group,the scores of inhibitory control in high intensity group had significantly greater changes after exercise.A linear trend was found for the dose-response relationship between exercise intensity and the changes of cravings,emotional status,attentional bias and inhibitory control.Conclusions: High intensity resistance exercise may provide greater effects for heroin dependent individuals.The second study: To determine the different effect between resistance exercise and aerobic exercise on heroin cravings,emotional status,attentional bias and executive functions among heroin dependent individuals.Method: The crossover randomized controlled trial.26 male individuals with heroin dependent(aged32.04±5.00 years)were recruited.The participants were randomly involved in high intensity resistance exercise task(75%-80%1-RM),high intensity aerobic exercise task(75%-80% HRmax)and control task.The participants then tested the craving,emotional status,attentional bias and executive functions during pre-and post-exercise.Results: resistance exercise and aerobic exercise were compared with the control group,the cravings and the scores of attentional bias after high resistance exercise and aerobic exercise had significantly greater changes;And there weren’t significantly different between resistance exercise and aerobic exercise;Compared with the control group,the scores of emotional status and the scores of inhibitory control in high resistance exercise task and aerobic exercise task had significantly greater changes 10 minutes after exercise and 50 minutes after exercise;And there weren’t significantly different between resistance exercise and aerobic exercise.Conclusions: Both resistance exercise and aerobic exercise can provide greater effects for heroin dependent individuals.Above all,a single bout of acute high intensity resistance exercise(75%-80%1-RM)can reduce the heroin craving.