as any one ever heard bout this and or weighted vest and shorts? are they effective or just a marketing tool? Ive always wanted to add just a lil more weight on bodty while run or do training anfd or punching bag. but my bro says once i can do it all with ease than add weights to the training. thats true, but also i would like to wear just to build up muslce in area that i havnt done.. like calf, front shin and thighs from standing and so when i run.. it wont hurt as much and i wont get sore.. just trying to strengthen up the core and seeing if these would b e the best option or just do hard training? Seeing if people use them and see how they work and if its worth the investment. i'm trying to up my game, because right now i have to go to the gym both morning and evening to do either cardio and weight lifting due to work schedule. i wanted to try to limit this. and see if this product would help to do this.. do HIIT trainign with vest and shorting the time of cardio