Do trackballs actually help with wrist and RSI strain?

Many verified-purchase reviewers and YouTube reviewers describe trackballs as tension-reducing because the device stays still and only the ball moves. That said, reviewers consistently caution that comfort is highly hand-dependent and there is an adjustment period; some specialist-community members with large hands find certain low-profile shells less comfortable. A trackball is a credible option for reducing arm movement, not a guaranteed medical fix.