Draw a Running Stick Figure: Joint Angles and Four-Frame Stride

Object Drawing Lessons

This lesson teaches a repeatable method for drawing a running stick figure as a four-frame stride sequence. You will use a simple stick-figure convention: a circle for the head, a single line for the torso, two lines per arm, two lines per leg, and small marks for hands and feet. Joint angles are measured at the hip, knee, and shoulder using a protractor or by estimating from a printed grid. The goal is not realism but clear, labeled construction that shows how the limbs change across the stride. All angle values given here are hypothetical examples for practice; measure your own drawing to check consistency. The sequence uses four phases: contact, drive, flight, and recovery. Each frame shares the same body proportions and the same angle-labeling convention, so you can compare frames directly. You will also learn common mistakes, a worked example, and four practice tasks with reasoning and check methods.

Practice materials: Printable downloads are not available for this lesson yet. Use the instructions and four exercises below.

Convention and Setup

Define the stick-figure convention before drawing. The head is a circle about one-eighth of the total figure height. The torso is a straight line from the neck to the hip point. Each arm is two segments meeting at an elbow; each leg is two segments meeting at a knee. Hands and feet are short marks, not detailed shapes. Label joint angles at the hip (between torso and thigh), knee (between thigh and shank), and shoulder (between torso and upper arm). Measure angles in degrees from the torso line, using a protractor or a printed grid. Keep the same convention in every frame so the sequence is comparable.

Set up a four-frame strip: four equal rectangles in a row, each tall enough for the full figure. Draw a faint vertical midline and a horizontal ground line in each frame. The ground line is the same height in all frames. Use a pencil for construction lines and a darker pencil for final lines. Write angle labels beside each joint with a short leader line. Do not erase construction lines until the frame is checked.

1. Draw four equal rectangles in a row and label them Frame 1 to Frame 4.
2. In each frame, draw a faint vertical midline and a horizontal ground line at the same height.
3. Mark the head circle, torso line, and hip point using the same proportions in every frame.
4. Add arm and leg segments, then label hip, knee, and shoulder angles with leader lines.

Four-Frame Stride Sequence

Frame 1 is contact: the front foot touches the ground near the midline, the back leg is extended behind, and the arms are opposite the legs. Frame 2 is drive: the support leg pushes, the free knee lifts forward, and the torso leans slightly forward. Frame 3 is flight: both feet are off the ground, one knee is high in front, and the other leg trails behind. Frame 4 is recovery: the trailing leg swings forward and the arms swap positions, preparing for the next contact; in this convention the recovery frame may show the swinging foot just above or just touching the ground, so state which you intend and keep it consistent.

Use hypothetical example angles to practice labeling: in Frame 1, hip angle 140 degrees on the front leg and 160 degrees on the back leg; knee angle 170 degrees on the front leg and 150 degrees on the back leg; shoulder angle 30 degrees forward and 40 degrees back. In Frame 3, hip angle 90 degrees on the front leg and 170 degrees on the back leg; knee angle 80 degrees on the front leg and 160 degrees on the back leg. These numbers are examples only; measure your own drawing and record the actual values.

1. Frame 1: place the front foot at the ground line near the midline and extend the back leg behind.
2. Frame 2: lift the free knee forward and push the support leg, keeping the torso lean small and consistent.
3. Frame 3: raise both feet off the ground, with one knee high in front and the other leg trailing.
4. Frame 4: swing the trailing leg forward and swap arm positions to prepare for the next contact.

Labeling and Checking Angles

Label each joint angle with a number and a short leader line. Use the same reference line in every frame: measure the hip angle from the torso line to the thigh, the knee angle from the thigh to the shank, and the shoulder angle from the torso line to the upper arm. If you use a protractor, place the center at the joint and align the zero line with the reference segment. If you estimate from a grid, record the estimate and mark it as an estimate. Check that opposite limbs have plausible differences: for example, when one hip angle is small (leg forward), the other hip angle is usually large (leg back).

Check consistency by comparing frames: confirm that each labeled angle matches the drawn segments, and that the stride changes smoothly from contact to drive to flight to recovery. Look for impossible bends: a knee angle near 0 degrees means the shank folds back onto the thigh, which is not a running pose. Measure all angles as the smaller angle between the two segments, so every labeled value is between 0 and 180 degrees; if a measurement seems to exceed 180 degrees, you have measured the reflex angle and should record 360 minus that value. Correct labels that do not match the drawn segments.

1. Place the protractor center at the joint and align zero with the reference segment.
2. Record each angle to the nearest 5 degrees and write it beside the joint.
3. Compare left and right limb angles within the frame for plausible opposition.
4. Compare the same joint across frames to confirm the stride changes smoothly.

Worked example

A learner draws Frame 1 with the front hip at 140 degrees, front knee at 170 degrees, back hip at 160 degrees, and back knee at 150 degrees. The shoulder angles are 30 degrees forward and 40 degrees back. Check whether the labels match a plausible contact pose and state one correction if needed.

Four practice exercises

Common mistakes

• Drawing the same leg angles in every frame. Change at least one hip or knee angle between consecutive frames and label the change.
• Measuring angles from the wrong reference line. Always measure hip and shoulder angles from the torso line and knee angles from the thigh line.
• Letting the head height drift far between frames. Keep the head circle at nearly the same height and note any small change.
• Labeling angles without leader lines, so the joint is unclear. Draw a short leader line from each angle number to the exact joint.

Self-check rubric

• Four frames are present and labeled Frame 1 to Frame 4.
• The stick-figure convention is stated and used consistently in all frames.
• Hip, knee, and shoulder angles are labeled at each joint with leader lines.
• Angle values are measured or marked as estimates, with units in degrees.
• The stride sequence shows clear changes between contact, drive, flight, and recovery.
• Valid alternative conventions are accepted if stated and applied consistently.

Questions and answers