This study perform to investigate the comparison of the effects of different exercise types on lower extremity muscle thickness, tendon thickness, muscle strength, proprioception and balance.

The choice of exercise type is affected by many different factors. The purpose of exercise and the physical fitness parameter they want to develop gain importance in this choice.

Resistance exercises (RE) specifically designed to increase muscle strength and hypertrophy; Plyometric exercises (PE) based on energy storage of the muscle during the deceleration phase and release of this energy during the acceleration period and high-intensity interval training (HIIT), which is an advanced form of interval training that includes shorter and lighter recovery periods following short to heavy anaerobic exercise are some of the many types of exercises in the literature and practice.

The purpose of the study is investigate the comparison of the effects of different exercise types on lower extremity muscle thickness, tendon thickness, muscle strength, proprioception and balance.

Inclusion Criteria:

1. Being 18-30 years old
2. Being a man
3. Volunteering to participate in the study
4. Having a normal BMI (18.5-24.9) according to the World Health Organization criteria

Exclusion Criteria:

1. Having any physical, mental or psychological illness that may affect participation in the study
2. Having a history of trauma to the lower extremity requiring medical, conservative and surgical treatment in the last 6 months
3. Consuming alcohol or pharmaceuticals up to 24 hours before the assessment

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