Vipin Chauhan

07/01/2026

Crossfit daily workout

14/12/2025

athlete's ability to perform repeated high-intensity efforts with short rest periods

26/11/2025

RFD (simple)

RFD = how quickly you can produce force.
Not the maximum force you can eventually make, but how fast you get force out in the first 0–100 ms of a contraction. That quick burst is what often determines sprint start speed, jump height, punch/kick speed, and how fast you can stop or change direction.

Why it matters
Faster starts, higher jumps, quicker changes of direction.
Better ability to absorb and brake forces (eccentric RFD) — reduces injury risk.
Transfers to sport tasks that happen in

25/11/2025

Primary Muscle Groups (Front Leg - Deceleration/Shock Absorption)
Key Muscles and Actions:
Quadriceps Femoris (Vastus group, Re**us femoris): Stabilizes the knee joint and helps control knee flexion during initial contact and loading response, acting eccentrically to absorb impact.

# # Hamstrings: Controls the progression of the body over the limb by acting eccentrically to control knee extension and hip flexion at initial contact.

# # Gluteus Maximus and Medius: The gluteus medius is crucial for stabilizing the pelvis in the frontal plane, preventing the opposite hip from dropping, and generates significant force during the first half of the stance phase. The gluteus maximus also contributes to hip stability and extension.

# # Soleus and Gastrocnemius (Calf muscles): These plantarflexors control the rate of ankle dorsiflexion during mid-stance (eccentric action) and then contract concentrically to push the body forward during the push-off or pre-swing phase.

# # Core Muscles: Respiratory and core muscles work synergistically to provide essential automatic stabilization and transfer energy between the upper and lower body.

24/11/2025

Primary MusclesQuadriceps (vasti), hamstrings, gluteus maximus, gluteus medius, soleus, gastrocnemiusQuadriceps, hamstrings, gluteals, hip abductors, adductors, and core musclesMuscle Contraction TypeHigh eccentric (braking/deceleration) and concentric (propulsion/acceleration) forces are required.Primarily dynamic concentric and eccentric contractions in a rhythmic, continuous manner.Movement DemandsInvolves rapid deceleration, a sharp plant, and powerful acceleration in a new direction, placing high demand on neuromuscular control.Focuses on quick, short steps to maintain a low center of gravity and continuous side-to-side motion, generally used for agility and warm-up drills.Injury RiskHigher risk of non-contact ACL injuries due to high knee abduction (valgus) and internal rotation moments during the plant phase.Lower injury risk; helpful for improving stability and balancing muscle use by engaging less dominant lateral muscle group

24/11/2025

The primary muscle groups involved in the turning movement are:
Quadriceps: These muscles on the front of the thigh are crucial for decelerating the body (acting as a brake) as you approach the turning point and controlling knee flexion. They also help extend the knee during the push-off phase of re-acceleration.
Hamstrings: Located on the back of the thigh, the hamstrings are involved in both hip extension and knee flexion, and play a key role in pushing off the ground and generating propulsive force during the change of direction.
Glutes (Gluteal muscles): The glutes are vital for hip extension and providing power during the propulsive phase of the turn. They are also heavily involved in stabilizing the hips and torso during the rapid change of direction.
Calves (Gastrocnemius and Soleus): These lower leg muscles are essential for pushing off the ground, lifting the heel, and providing ankle stability and power for the explosive re-acceleration out of the turn.
Hip Flexors and Adductors/Abductors: The hip flexors help lift the thigh during the running stride, while the hip adductors (inner thigh) and abductors (outer thigh/gluteus medius) are critical for lateral stability and control during the side-to-side movements of the turn.
Core Muscles (Abdominals and Obliques): A strong core is the foundation for proper form and balance. These muscles stabilize the trunk and control torso rotation during the sharp turn, ensuring force is transferred efficiently from the lower body.

23/11/2025

Back pain report

23/11/2025

L1and l1 normal
L2and L3 to L4 - mild to moderate fact osteophytes
L4o L5 - mild circumferential disce bulge moderate bilateral facet narrowing ( disce is pushing slightly all around )
L5 to S1 - most important level:- broad based protrusion + narrowing + nerve compression ( this is the level causing pain
L5 - S1 the major problem
Mild disc bulge
Postero lateral disc protusion
Narrowing of the left lateral recess
Mild narrowing of both foramina
Mild compression of left s1 nerve root

22/11/2025

08/11/2025

Hip thrusts build a stronger posterior chain (glutes, hamstrings, and lower back), which boosts athletic performance in activities like sprinting and jumping, improves posture, and reduces lower back pain by strengthening supporting muscles. They also enhance core stability, contribute to better balance, can improve bone density, and support functional strength for daily activities like climbing stairs or picking up objects.