TRX
Also known as: Suspension training
TRX is a brand of suspension-training equipment. Suspension training uses adjustable straps anchored above or in front of the user, usually with handles or foot cradles. Body position and gravity provide most of the resistance while the straps support the hands or feet. The generic category also includes equipment from other manufacturers.
Common movements include suspended rows, presses, squats, lunges, hamstring curls, fallouts, and plank variations. The difficulty can be changed by moving the feet relative to the anchor, altering body angle, shortening or lengthening the straps, changing the base of support, or using one side at a time. Small position changes can meaningfully alter leverage, so consistent setup matters for tracking.
Suspension work is a form of bodyweight exercise, although the straps supply external support and create instability. That instability can increase the control required from the trunk, shoulders, hips, or other supporting structures. It can also reduce the load the main muscles can produce. More instability is therefore not automatically a better stimulus; it is useful only when controlling it serves the exercise goal.
Suspension training differs from resistance-band training. A suspension strap should not stretch substantially to create resistance; it redirects and supports body weight. An elastic band changes tension as it lengthens. The tools can sometimes be used for similar movement patterns, but their loading and feedback are different.
Progression should be recorded with more than the exercise name. Note the strap length or marker, anchor height, foot position, body angle, range of motion, and whether the movement was bilateral or unilateral. Because external load is hard to express in kilograms, repetitions alone may be misleading when leverage changes.
Use only an anchor and mounting surface rated for the intended forces. Check straps, buckles, stitching, door anchors, and handles before training, and test the setup gradually close to the floor. A portable trainer can suit travel or a home gym, but portability does not remove the need for clearance and a secure attachment point.