KINESIOLOGY 220 EXAM 1 WITH
COMPLETE SOLUTIONS
2026-2027!! | Verified Questions
KINESIOLOGY 220 EXAM 1 WITH COMPLETE SOLUTIONS |
Comprehensive Examination
KINESIOLOGY 220 EXAM 1 WITH COMPLETE
SOLUTIONS 2026-2027!! actual exam preparation document
with verified questions, complete answers, and focused
INTRODUCTION
This document is an important and very helpful preparation
resource for KINESIOLOGY 220 EXAM 1 WITH
COMPLETE SOLUTIONS 2026-2027!!. Every item uses a
focused exam stem, four response options, a keyed response,
and a clear rationale, making it easier to understand the
subject, spot distractors, and build real exam confidence.
Page 1
, Question 1
During a maximal-effort isokinetic knee extension test, the measured peak
torque occurs at a joint angle where the quadriceps moment arm is near its
maximum. Which biomechanical factor most directly explains why peak
torque is not observed at the same angle during isometric testing?
A. The force-velocity relationship of muscle fibers reduces force at that
angle during isokinetic movement.
B. The length-tension relationship alters actin-myosin overlap at that
specific joint angle.
C. The moment arm changes continuously during isokinetic movement,
shifting the torque-angle curve.
D. Antagonist co-contraction is greater during isokinetic than isometric
contractions.
Correct Answer: A - The force-velocity relationship of muscle
fibers reduces force at that angle during isokinetic movement.
RATIONALE
During isokinetic movement, angular velocity is constant but linear
muscle shortening velocity varies with moment arm, so the
force-velocity relationship reduces force at angles where moment arm
is maximal. Isometric testing has zero velocity, so force-velocity
effects are absent, and peak torque aligns with maximal moment arm
and optimal length. The length-tension relationship (B) is similar in
both conditions, moment arm changes (C) affect both but do not
explain the shift, and co-contraction (D) is not the primary
determinant.
Question 2
In a patient with a lesion in the dorsal column-medial lemniscus pathway,
which aspect of motor control is most likely impaired during a reaching task?
A. Generation of a ballistic movement trajectory
B. Online correction of movement errors using visual feedback
Page 2
, C. Feedforward anticipation of limb dynamics
D. Timing of muscle activation onset
Correct Answer: B - Online correction of movement errors using
visual feedback
RATIONALE
The dorsal column-medial lemniscus pathway carries proprioceptive
and tactile information essential for feedback-based corrections during
ongoing movements. Ballistic trajectory generation (A) and
feedforward control (C) rely more on cerebellar and motor cortical
circuits, while muscle activation timing (D) is primarily governed by
corticospinal and brainstem pathways. Thus, impaired feedback
correction is the most direct consequence.
Question 3
Which of the following best explains why the metabolic cost of transport
(COT) is minimized at a preferred walking speed in healthy adults?
A. At slower speeds, the cost of maintaining posture dominates; at faster
speeds, the cost of swinging limbs increases.
B. At slower speeds, the cost of swinging limbs is high; at faster speeds,
the cost of generating force against gravity decreases.
C. At slower speeds, elastic energy storage is maximized; at faster speeds,
muscle efficiency declines.
D. At slower speeds, the cost of balance control is minimal; at faster
speeds, the cost of braking forces decreases.
Correct Answer: A - At slower speeds, the cost of maintaining
posture dominates; at faster speeds, the cost of swinging limbs
increases.
Page 3
, RATIONALE
The U-shaped COT curve arises because at slow speeds, the metabolic
cost of maintaining upright posture and muscle tone is relatively high
per distance, while at fast speeds, the cost of accelerating and
decelerating the limbs increases. Elastic energy storage (C) and
braking forces (D) do not follow the described patterns. Option B
incorrectly states that swinging limb cost is high at slow speeds.
Question 4
A researcher observes that during a fatiguing submaximal isometric
contraction, motor unit firing rates decline while EMG amplitude increases.
Which mechanism best explains this dissociation?
A. Increased synchronization of motor unit action potentials
B. Reduced muscle fiber conduction velocity
C. Recruitment of additional motor units to compensate for reduced firing
rates
D. Enhanced afferent feedback from muscle spindles
Correct Answer: C - Recruitment of additional motor units to
compensate for reduced firing rates
RATIONALE
During fatigue, the central nervous system may recruit additional
motor units to maintain force output despite a decline in firing rates of
already active units, leading to increased EMG amplitude.
Synchronization (A) can increase amplitude but does not explain the
firing rate decline. Reduced conduction velocity (B) affects EMG
frequency, not necessarily amplitude. Enhanced spindle feedback (D)
would not directly cause this dissociation.
Question 5
Which of the following statements accurately describes the role of the
stretch-shortening cycle (SSC) in enhancing jump performance?
Page 4
COMPLETE SOLUTIONS
2026-2027!! | Verified Questions
KINESIOLOGY 220 EXAM 1 WITH COMPLETE SOLUTIONS |
Comprehensive Examination
KINESIOLOGY 220 EXAM 1 WITH COMPLETE
SOLUTIONS 2026-2027!! actual exam preparation document
with verified questions, complete answers, and focused
INTRODUCTION
This document is an important and very helpful preparation
resource for KINESIOLOGY 220 EXAM 1 WITH
COMPLETE SOLUTIONS 2026-2027!!. Every item uses a
focused exam stem, four response options, a keyed response,
and a clear rationale, making it easier to understand the
subject, spot distractors, and build real exam confidence.
Page 1
, Question 1
During a maximal-effort isokinetic knee extension test, the measured peak
torque occurs at a joint angle where the quadriceps moment arm is near its
maximum. Which biomechanical factor most directly explains why peak
torque is not observed at the same angle during isometric testing?
A. The force-velocity relationship of muscle fibers reduces force at that
angle during isokinetic movement.
B. The length-tension relationship alters actin-myosin overlap at that
specific joint angle.
C. The moment arm changes continuously during isokinetic movement,
shifting the torque-angle curve.
D. Antagonist co-contraction is greater during isokinetic than isometric
contractions.
Correct Answer: A - The force-velocity relationship of muscle
fibers reduces force at that angle during isokinetic movement.
RATIONALE
During isokinetic movement, angular velocity is constant but linear
muscle shortening velocity varies with moment arm, so the
force-velocity relationship reduces force at angles where moment arm
is maximal. Isometric testing has zero velocity, so force-velocity
effects are absent, and peak torque aligns with maximal moment arm
and optimal length. The length-tension relationship (B) is similar in
both conditions, moment arm changes (C) affect both but do not
explain the shift, and co-contraction (D) is not the primary
determinant.
Question 2
In a patient with a lesion in the dorsal column-medial lemniscus pathway,
which aspect of motor control is most likely impaired during a reaching task?
A. Generation of a ballistic movement trajectory
B. Online correction of movement errors using visual feedback
Page 2
, C. Feedforward anticipation of limb dynamics
D. Timing of muscle activation onset
Correct Answer: B - Online correction of movement errors using
visual feedback
RATIONALE
The dorsal column-medial lemniscus pathway carries proprioceptive
and tactile information essential for feedback-based corrections during
ongoing movements. Ballistic trajectory generation (A) and
feedforward control (C) rely more on cerebellar and motor cortical
circuits, while muscle activation timing (D) is primarily governed by
corticospinal and brainstem pathways. Thus, impaired feedback
correction is the most direct consequence.
Question 3
Which of the following best explains why the metabolic cost of transport
(COT) is minimized at a preferred walking speed in healthy adults?
A. At slower speeds, the cost of maintaining posture dominates; at faster
speeds, the cost of swinging limbs increases.
B. At slower speeds, the cost of swinging limbs is high; at faster speeds,
the cost of generating force against gravity decreases.
C. At slower speeds, elastic energy storage is maximized; at faster speeds,
muscle efficiency declines.
D. At slower speeds, the cost of balance control is minimal; at faster
speeds, the cost of braking forces decreases.
Correct Answer: A - At slower speeds, the cost of maintaining
posture dominates; at faster speeds, the cost of swinging limbs
increases.
Page 3
, RATIONALE
The U-shaped COT curve arises because at slow speeds, the metabolic
cost of maintaining upright posture and muscle tone is relatively high
per distance, while at fast speeds, the cost of accelerating and
decelerating the limbs increases. Elastic energy storage (C) and
braking forces (D) do not follow the described patterns. Option B
incorrectly states that swinging limb cost is high at slow speeds.
Question 4
A researcher observes that during a fatiguing submaximal isometric
contraction, motor unit firing rates decline while EMG amplitude increases.
Which mechanism best explains this dissociation?
A. Increased synchronization of motor unit action potentials
B. Reduced muscle fiber conduction velocity
C. Recruitment of additional motor units to compensate for reduced firing
rates
D. Enhanced afferent feedback from muscle spindles
Correct Answer: C - Recruitment of additional motor units to
compensate for reduced firing rates
RATIONALE
During fatigue, the central nervous system may recruit additional
motor units to maintain force output despite a decline in firing rates of
already active units, leading to increased EMG amplitude.
Synchronization (A) can increase amplitude but does not explain the
firing rate decline. Reduced conduction velocity (B) affects EMG
frequency, not necessarily amplitude. Enhanced spindle feedback (D)
would not directly cause this dissociation.
Question 5
Which of the following statements accurately describes the role of the
stretch-shortening cycle (SSC) in enhancing jump performance?
Page 4
