Carolina Fitness Magazine - The Christmas Abbott Issue Fall 2015 | Page 22

Cover Credits
Hair & Makeup: Victor De Leon
Photography: Yaira O. Photography

Article Credits
HIIT The Gym
Christopher Surratt, EP-C, CPT
Personal Trainer/Group Exercise Instructor

Resources
1. Bachle, T., & Earle, R. W. (2008).
Essentials of strength training and conditioning (3rd ed.). Champaign, IL: Human Kinetics.
Appendix 1: Experience 6 (10) - Ventilatory
Threshold
Name of Investigator: Ciara Delgado
Introduction: Ventilation is the amount of air
moved in and out of the lungs. This is how
oxygen is taken into the lungs.
Purpose: The purpose of this experiment is
to determine if and to what extent ventilation
effects exercise.
Method: Subject was fitted to the mask and
was also fitted with a heart rate monitor and
watch. The subject warmed up at 3mph on
the treadmill. Heart rate was recorded every
minute of exercise. Subject began at 2mph
and increased 1mph until reaching 9mph.
After 9mph, investigators added grade (up the
12.5%). Subject stopped exercise at 14 minutes, walked at 2mph, and then dismounted
the treadmill.
Results/Discussion: Heart rate and Ventilation
both increased as the workloads increased.
The heart rate reached a maximum of
171bpm, Ventilation had a maximum value of
141 L/min, and VCO2 increased to 93.17ml/

kg/min. VO2max was 76.6 ml/kg/min, with the
cross over around 65 ml/kg/min. According
to the VCO2/VO2 graph, the cross over point
in the graph shows that at 12 minutes of
exercise the amount of CO2 increased higher
than the amount of O2 available. Utilization
of the oxygen being delivered by ventilation
was not as high as it was at the beginning
of exercise.
Conclusion: Ventilation is not a limiting factor
during exercise.
Relation: The O2 concentration transported
to working muscles within the bloodstream is
the concern with the training of aerobic and
anaerobic methods. Ventilation (or the rate of
O2/CO2 in and out of the upper respiratory
system), is not a limiting factor in performance. Issues of asthma or other respiratory
disease are a different matter. Train the
muscles to operate effectively in high acidity,
low oxygen conditions and one can improve
the level of performance for an athlete.
Appendix 2: Experience 2 – Exercise Cost of
Incremental Exercise
Name of Investigator: Ciara Delgado
Introduction: Oxygen consumption (VO2)
and carbon dioxide production (VCO2) levels
change during exercise. When measuring

these two figures, researchers are indirectly
measuring the subject’s maximal capacity to
do work aerobically.
Purpose: To determine whether O2 consumption and CO2 production will increase or
decrease linearly with an increasing workload
on a treadmill.
Method: The subject was acclimated to the
treadmill for 3 minutes (3mph/0%grade). The
subject then stretched out for one minute.
After the mask was fitted to the subject, the
test subject stood stationary for 3 minutes
and steady state gases were collected. The
subject then walked (3mph/0%grade) on
the treadmill for 2 minutes. The speed was
increased by 1m ]