Are Lined or Unlined Gym Shorts Better for Working Out? Fitness Editors Weigh in.

# Lined vs. Unlined Gym Shorts: What Fitness Professionals Actually Recommend

The choice between lined and unlined gym shorts matters more than most people realize. It affects comfort during workouts, chafing risk, and how freely you can move. Men's Health fitness editors tested both styles across different training scenarios to determine which performs better in real conditions.

Lined shorts contain a built-in brief or mesh interior layer. This layer serves multiple functions. It reduces chafing between skin and fabric, provides support for the groin area, and prevents the shorts from riding up during dynamic movement. The liner also adds moisture-wicking capability, pulling sweat away from skin to help with temperature regulation. Most fitness professionals recommend lined shorts for high-impact activities like running, jumping, or circuit training where movement ranges are extreme and repetitive.

Unlined shorts skip this interior layer entirely. Proponents argue this creates a lighter, more minimal feel with better airflow. Athletes report less heat buildup and a sensation of greater freedom during movement. The tradeoff comes with visible concerns. Without a liner, shorts cling to legs when wet. They offer less support, which matters during heavy lifting or explosive movements. Chafing becomes a real risk during longer sessions, especially for runners.

The research leans toward lined shorts for most training contexts. A key consideration involves sweat management. During intense exercise, moisture accumulates quickly. Lined shorts designed with mesh or moisture-wicking materials outperform unlined options at moving this sweat away from skin. The barrier also protects against bacteria transfer from shared equipment like benches or squat racks.

For specific activities, editors noted patterns. Strength training benefits from lined shorts because they prevent uncomfortable riding during compound movements. The support becomes relevant when squatting heavy or deadlifting. Running demands lined shorts almost universally due to chafing prevention over distance. Hybrid sessions combining weights and cardio call for lined options to handle both demands efficiently.

Unlined shorts earn their place in specific scenarios. Hot climates where maximum airflow matters can justify the choice. Low-intensity workouts like casual gym sessions or yoga sometimes fit this profile. Some athletes simply prefer the aesthetic minimalism and accept the tradeoffs. Personal sweat production matters here. Light sweaters may find unlined shorts adequate for shorter sessions.

Fabric quality trumps the lined/unlined question for most buyers. High-end unlined shorts sometimes outperform budget-lined versions due to superior fabric composition and design. Nylon blends, elastane content, and construction quality affect performance more than the presence of a liner alone. Premium shorts often feature both lining and advanced fabrics that handle moisture better than basic models.

Men's Health editors recommend lined shorts as the default choice for anyone serious about training. The support, chafing prevention, and moisture management create fewer problems during workouts. For runners training moderate to long distances, lined shorts become non-negotiable. If you primarily do low-intensity training in cool conditions, unlined options work fine. Test both styles across your actual workout routine before committing to a closet full of one type. Your legs will thank you during mile five or lift ten.