per palestre in cui lo spazio occupato dal sacco può servire a altre attivita ci sono vari sistemi artigianali e brevettati
TuffRail
https://www.youtube.com/user/TuffRailSaleshttps://www.youtube.com/watch?v=nmj87wBWCoUPUNCHING BAG SLIDE SYSTEM
https://www.youtube.com/watch?v=6_GwmD2lmFASliding Heavy Bag (including materials and construction)
I wanted a moving heavy bag in order to practice the "retsev" techniques taught by my Krav Maga school. Using a 2x6 screwed into rafters, I securing two 6 ft pocket door tracks (side by side) to the 2x6 using self-drilling desk screws. I inserted two pocket door hanger ball bearings inside the track, and lined the wheels with duck tape to slow down the sliding a bit. Hooked a carabiner to each ball bearing, then one connecting both to produce a more fluid movement. Drilled holes at each end and used a pushpin to use as stoppers.
All materials were purchased from Amazon and Lowes. The total cost was about $45 (excluding heavy bag).
https://www.youtube.com/watch?v=_Jlap1BGUu8http://www.ehow.com/how_8749997_build-sliding-heavy-bag.htmlhttp://rosstraining.net/forum/viewtopic.php?t=71121si può anche appendere il sacco a una carrucola
che poggi la ruota su un tubo o un cavo d'acciaio di adeguate dimensioni