2020 TSMA

69 for triathlon training. It could be equipped with a special kind of treadmill at the bottom for the user to run in the water. The benefit is that in the same running condition, foot muscles shoulder much less impact force than that of road running. It provides the benefits of cardiovascular training. Meanwhile, it does not lose the advantages of single training. So does cycling. It can also bring positive effects on cardiovascular functions which running requires. What’s more, it shoulders no impact of feet landing on the ground. Running in the water, cycling or swimming are basically counted as the cross training in the marathon trainings. These types of sports can be scheduled as recovery run. It empowers metabolism and enhance cardiovascular functions at the same time. Accordingly, the strength level cannot be too high. Heartrate monitor could assist to supervise the strength level. Nowadays, there is a waterproof heartrate monitor for swimming. Undoubted, the swimmer can inspect the strength level during swimming. However, the optical heartbeat measurement is not precise enough, not appropriate to be taken as the precise inspection tool. The proper strength shall be sixty five to seventy nine percent of the maximum heart rate or fifty nine to seventy four percent of the heart rate reserve. B e c a u s e ma r a t hon s a r e a l l ou t doo r competitions, most of running trainings shall be conducted on the road or sports fields in principle. However, when the climate is too cold or humid, or no proper route while going on a business trip, the runner needs to run for 120 kilometers every week. Then it is necessary to use a treadmill and sometimes, the runner has to run 30 minutes during the break time. At present there are some runners who use treadmill as the major training tool. They could finish a marathon within three hours. However, the running on the treadmill is comparatively boring and the same muscle group repeats the same movement. Medically, such a practice would increase the risk of sports injuries. Nevertheless, simply reviewing the training achievement, using the treadmill as a training tool does not necessarily perform worse than the outdoor running. Because the treadmill driven by motor, running would be easier than running on the road. Therefore, through certain settings, the runner would have the similar feelings as if running on the road. Usually, the expert would recommend to set the inclination degree at one or two percent. This setting would be close to the normal road conditions. As to the