Feet, Ankles, Knees and Legs

The lower limb links floor contact to whole-body movement, but it is not a row of parts that must match one visual line. Foot contact, ankle range, knee motion, hip position, stance, speed, load, proportions, and support interact. Teach the task and gather feedback before changing a student's shape.

Base and Load Are Task-Specific

A foot may contact the floor through several areas, and pressure normally changes as a person shifts, walks, balances, squats, rises, or transitions. 'Tripod foot' or 'four corners' can be attention cues, but they are teaching conventions—not proof that pressure must be equal at every moment or that one footprint prevents injury. Notice whether the available contact supports the stated task.

• Change the base by widening, narrowing, shortening, staggering, turning, or adding a wall or chair—then name how the task changed.
• Ask where pressure is felt rather than declaring that an arch, heel, or toe is collapsed, inactive, or pathological.
• In balance, a grounded toe, hand support, or slower transition can preserve orientation practice while reducing instability.
• Shoes, mats, floor friction, props, fatigue, and sensory differences can change feedback; no single cue fits every environment.

Ankle Range Changes the Strategy

Dorsiflexion brings the top of the foot toward the shin; plantar flexion points the foot away. In a squat or lunge, ankle range, heel contact, foot angle, stance length, proportions, balance, and the task all affect where the knee and trunk travel. A heel lift, shorter stance, reduced depth, or higher support can be a legitimate experiment—not a correction for a defective body.

Knees Do Not Follow One Landmark Rule

The knee primarily flexes and extends, with additional coupled motion across the joint. A cue such as 'knee over ankle' can set one lunge variation, but it is not a universal safety boundary. In a small study of loaded squats, preventing the knees from moving forward reduced knee torque while greatly increasing hip torque and trunk lean. The study does not prescribe yoga technique; it illustrates that changing one joint strategy redistributes demand rather than making load disappear.

• Describe direction neutrally: 'Notice the path of your knee relative to your foot' is different from diagnosing collapse.
• Use the student's comfort, control, task, load, history, and available range; do not infer tissue damage from one frame of movement.
• Try a wider or shorter stance, different foot angle, smaller range, support under the back knee, blocks under the hands, or a standing alternative.
• Let the student choose among options and recheck during the transition, not only in the final pose.

Four Teaching Cases

1. Mountain Pose: instead of demanding equal pressure at fixed foot points, invite a small forward-back and side-to-side shift, then choose a contact pattern that feels available for standing and breathing.
2. High Lunge: decide whether the task is balance, transition, hip range, or leg effort. Shorten or widen the stance, lower the back knee, use wall support, or reduce depth according to that task.
3. Chair or squat pattern: permit task-appropriate knee travel and trunk angle. A chair target, heel support, reduced depth, or slower tempo changes demand; none is a universal progression ladder.
4. Single-leg balance: a wall, chair, kickstand toes, lower gaze, or two-foot version can preserve orientation and recovery practice without requiring stillness.

Key Terms

• Contact: an area where the body meets external support; contact pressure can change during movement.
• Dorsiflexion and plantar flexion: paired ankle movements that bring the top of the foot toward or away from the shin.
• Knee flexion and extension: bending and straightening at the knee, accompanied by task-dependent joint motion.
• Stance: the spatial relationship of the feet and other supports.
• Load redistribution: shifting demand among body regions or supports rather than assuming an option removes all force.

Practice Reflection

Compare two lunge versions using the same student-selected purpose. Change only one variable—stance length, width, support, depth, or back-knee position. Record contact, perceived effort, comfort, breath, and exit control without deciding which version is universally correct.

Quick Review

• Foot pressure changes with task; tripod and four-corner language are optional attention cues, not universal laws.
• Ankle range, proportions, stance, load, and support affect knee and trunk strategy.
• A visual knee landmark cannot diagnose tissue load or guarantee safety.
• Options redistribute demand and must be tested with student feedback and a controlled exit.