Add some variety to leg day by incorporating wall-sit variations that recruit more muscle fibers.

Image Credit: stockfour/iStock/GettyImages Basic but brutal, wall sits bring the burn on leg day. That’s because this simple isometric (static) exercise is also a compound move, simultaneously recruiting your quads, hamstrings and glutes, says Tatiana Lampa, CFSC, NASM-CES, creator of the Training with T app.

  Advertisement
 While your lower body will definitely feel the effects of wall sits (think: trembling thighs), sometimes you need to revamp your routine a bit to keep your progress going (and to bust boredom). That's where wall sit variations come into play.

  Video of the Day
  For an even bigger burn in your legs, modify with these five super tough versions. But before you do, make sure that you've mastered the standard wall sit first.

  Advertisement
 Standard Wall Sit

Stand against a wall with your feet several inches away from the wall. Slide your back down the wall until your hips and knees are at 90-degree angles. Keep your shoulders, upper back and head flat against the wall and distribute your weight evenly throughout both feet. Hold this position for 30 to 60 seconds.

Now Try These 5 Wall-Sit Variations Since “wall sits activate your slow-twitch muscle fibers,” their main purpose is to improve muscle endurance, which is great for athletes who run or play sports like basketball or football, Lampa says.

  Advertisement
 
  Advertisement
 You can further fire up those muscle fibers by adding weights. "This means your legs need to stabilize while an extra load is on you," she says.

Incorporating additional movements is another simple way to ramp up the difficulty factor, Lampa says. Doing upper-body exercises like biceps curls, lateral raises or shoulder presses during wall sits will engage more muscles, light up your core and increase your calorie burn.

  Advertisement
 Perhaps the simplest, equipment-free way to make wall sits more demanding is to lift one leg off the floor. Like other unilateral exercises, single-leg wall sits challenge your balance, activate your core and strengthen your weaker side.

Move 1: Single-Leg Wall Sit Image Credit: Tatiana Lampa/LIVESTRONG.com

        Time
       
        30 Sec
      
        Activity
       
        Body-Weight Workout
      
        Body Part
       
        Legs

Slide your back down the wall until your hips and knees are at 90-degree angles. Keep your shoulders, upper back and head flat against the wall and distribute your weight evenly through both feet. Bracing your core, kick one leg out in front of you, so that your hip is parallel with your knee. Make sure your grounded leg maintains a 90-degree angle. Hold for 30 to 60 seconds, then switch sides.

  Show Instructions
  Move 2: Wall Sit With Adduction   Image Credit: Tatiana Lampa/LIVESTRONG.com
      
        Time
       
        15 Sec
      
        Activity
       
        Body-Weight Workout
      
        Body Part
       
        Legs

Slide your back down the wall until your hips and knees are at 90-degree angles. Keep your shoulders, upper back and head flat against the wall and distribute your weight evenly through both feet. Place a towel, pillow or soft medicine ball in between your knees and squeeze. Hold for 15 to 30 seconds.

  Show Instructions
  Move 3: Wall Sit With Biceps Curl   Image Credit: Tatiana Lampa/LIVESTRONG.com
      
        Reps
       
        10
      
        Activity
       
        Dumbbell Workout
      
        Body Part
       
        Arms and Legs

Holding dumbbells at your side with palms facing up, slide your back down the wall until your hips and knees are at 90-degree angles. Keep your shoulders, upper back and head flat against the wall and distribute your weight evenly through both feet. Contract your biceps and curl the weights up to shoulder height, squeezing your biceps at the top of the movement. Slowly lower down to your sides.

  Show Instructions
  Tip "A great way to make this harder is by creating extra tension by pressing your elbows against the wall while doing the biceps curl," Lampa says.

Move 4: Wall Sit With Lateral Raise Image Credit: Tatiana Lampa/LIVESTRONG.com

        Reps
       
        10
      
        Activity
       
        Dumbbell Workout
      
        Body Part
       
        Legs and Shoulders

Holding dumbbells at your side, slide your back down the wall until your hips and knees are at 90-degree angles. Keep your shoulders, upper back and head flat against the wall and distribute your weight evenly through both feet. In a controlled movement, raise your arms out to the side, keeping your elbows slightly bend, until they reach shoulder level. Slowly lower the weights back down.

  Show Instructions
  Move 5: Wall Sit With Shoulder Press   Image Credit: Tatiana Lampa/LIVESTRONG.com
      
        Reps
       
        10
      
        Activity
       
        Dumbbell Workout
      
        Body Part
       
        Legs and Shoulders

Holding dumbbells at your side, slide your back down the wall until your hips and knees are at 90-degree angles. Keep your shoulders, upper back and head flat against the wall and distribute your weight evenly through both feet. Bend your elbows and lift your upper arms to shoulder height, so the dumbbells are at ear level and your forearms and biceps form 90-degree angles. Press the weights up to the ceiling, fully extending your arms at the top, biceps close to your ears. Slowly lower the weights to ear level.

  Show Instructions
  
  Advertisement
 
  Advertisement
     






Add some variety to leg day by incorporating wall-sit variations that recruit more muscle fibers.

Image Credit: stockfour/iStock/GettyImages

Image Credit: stockfour/iStock/GettyImages

Image Credit: Tatiana Lampa/LIVESTRONG.com

        Time
       
        30 Sec
      
        Activity
       
        Body-Weight Workout
      
        Body Part
       
        Legs

Slide your back down the wall until your hips and knees are at 90-degree angles. Keep your shoulders, upper back and head flat against the wall and distribute your weight evenly through both feet. Bracing your core, kick one leg out in front of you, so that your hip is parallel with your knee. Make sure your grounded leg maintains a 90-degree angle. Hold for 30 to 60 seconds, then switch sides.

  Show Instructions

Image Credit: Tatiana Lampa/LIVESTRONG.com

        Time
       
        30 Sec
      
        Activity
       
        Body-Weight Workout
      
        Body Part
       
        Legs
      


        Time
       
        15 Sec
      
        Activity
       
        Body-Weight Workout
      
        Body Part
       
        Legs

Slide your back down the wall until your hips and knees are at 90-degree angles. Keep your shoulders, upper back and head flat against the wall and distribute your weight evenly through both feet. Place a towel, pillow or soft medicine ball in between your knees and squeeze. Hold for 15 to 30 seconds.

  Show Instructions
  


        Time
       
        15 Sec
      
        Activity
       
        Body-Weight Workout
      
        Body Part
       
        Legs
      


        Reps
       
        10
      
        Activity
       
        Dumbbell Workout
      
        Body Part
       
        Arms and Legs

Holding dumbbells at your side with palms facing up, slide your back down the wall until your hips and knees are at 90-degree angles. Keep your shoulders, upper back and head flat against the wall and distribute your weight evenly through both feet. Contract your biceps and curl the weights up to shoulder height, squeezing your biceps at the top of the movement. Slowly lower down to your sides.

  Show Instructions
  


        Reps
       
        10
      
        Activity
       
        Dumbbell Workout
      
        Body Part
       
        Arms and Legs

“A great way to make this harder is by creating extra tension by pressing your elbows against the wall while doing the biceps curl,” Lampa says.

        Reps
       
        10
      
        Activity
       
        Dumbbell Workout
      
        Body Part
       
        Legs and Shoulders

Holding dumbbells at your side, slide your back down the wall until your hips and knees are at 90-degree angles. Keep your shoulders, upper back and head flat against the wall and distribute your weight evenly through both feet. In a controlled movement, raise your arms out to the side, keeping your elbows slightly bend, until they reach shoulder level. Slowly lower the weights back down.

  Show Instructions
  


        Reps
       
        10
      
        Activity
       
        Dumbbell Workout
      
        Body Part
       
        Legs and Shoulders

Holding dumbbells at your side, slide your back down the wall until your hips and knees are at 90-degree angles. Keep your shoulders, upper back and head flat against the wall and distribute your weight evenly through both feet. Bend your elbows and lift your upper arms to shoulder height, so the dumbbells are at ear level and your forearms and biceps form 90-degree angles. Press the weights up to the ceiling, fully extending your arms at the top, biceps close to your ears. Slowly lower the weights to ear level.

  Show Instructions