Question

What is the difference between treadmill energy and overground energy? Which one is more cost effective and why? Explain the forces applied. Which source is using less force and why? How can you approximate the energy cost by gravitational energy? lost or gained? Why is there not a net change for the treadmill at an incline? What happens to the magnitude and direction of both energy sources?

Answer 1

* By converting the energy of sunlight to a usable form of chemical energy, photosynthesis is the source of virtually all metabolic energy in biological systems.

* Walking on the treadmill requires more metabolic energy than walking overground for all experimental speeds.

* It is evident from various observations performed reseachers that teadmill energy is moe cost efective than overgound energy.

*  Lower limb joint motion and muscle force intreadmill.

* when you put your foot on the ground, you are applying a force to it. In doing this, the ground also actually applies an equal force onto your foot, in the opposite direction, pushing you forward.

Here, you are applying force on the ground in the backward direction, and the ground applies forces on your foot in the forward direction which helps you to walk in the forward direction.

* Assuming the ground is rough enough, the force manages to keep the foot in place. Since the foot does not move, the force is static friction and not dynamic friction. The foot is balanced horizontally by backwards muscular force of the leg and forward static friction from the ground.

* In treadmill walking, the maximum forces of Gastrocnemius and Rectus femoris changed slightly with the stride frequency, while the maximum forces of Soleus and Vastus increased.

* Form the above graph overground walking uses less force than treadmill walking.

* From the data collected by researchers overground walking uses less force than treadmill walking.

* A motorized treadmill that will keep you going with less effort on your part. When your body has to expend more energy, you burn more calories.

* There are many physiological differences in walking along an incline versus on level ground, but what does physics have to say about it?

Normally, if you're on level ground (or a level treadmill), you stay at the same level in the Earth's gravitational field.

But if you walk uphill (or on an inclined treadmill), you not only need to move forward at whatever pace you were moving at, you also need to climb -- a little with every step -- out of the Earth's gravitational field!

The Earth's gravitational field is no slouch, either. I'm an 80 kg individual, and for me to raise my elevation by just 5.3 meters (about 17 feet) costs me 4,200 Joules of energy, also known as one food calorie.

* Loss of more metablic enregy due to gravitational energy.

* Direction and magnitude changes due to an incline