Not when it's used right. Heavy, bouncing vests can strain your knees, but published studies link a stable, no-bounce fit to better running economy. That's the same design principle behind VeloCore.

No. The weight is spread evenly across your torso in a snug, compression-style fit that moves with your body instead of against it, so it stays put through sprints, hills, and long runs.

Most experts recommend starting around 5-10% of your bodyweight and adding load gradually. VeloCore's quick-start guide walks you through safe, progressive increases from there.

Added resistance trains your legs to store and release energy more efficiently. Many runners notice their normal pace feels easier once they take the vest off after consistent training.

Bulky, bouncing vests are the usual culprit behind knee strain. VeloCore's snug, evenly-weighted fit is designed to preserve your natural stride, so you add resistance without the jarring impact that causes pain.

No. VeloCore's weight inserts are evenly distributed and held snug by the compression fit, and the reinforced stitching is built to handle rain, sweat, and repeated training without shifting.

Yes. The adjustable straps and stretch compression fabric cinch down to fit smaller frames securely, so the vest hugs your body instead of hanging loose like one-size-fits-all designs.

You can, but many runners prefer alternating loaded and unloaded runs so their body can adapt to the added resistance safely, especially in the first few weeks.