Ueduf7

1. 2015/2016
[ Lever system]
BY:- GARGI
SURYAVANSHI
Roll no:- B-47/20.
Supervised by :- Dr. Sonia salini.
INDIRA GANDHI INSTITUTE OF PHYSICAL
EDUCATION AND SPORTS SCIENCE

2.  Introduction
 When person is moving his leg -
arms - any part of his body
He depend on his Skelton
system (muscle forces)
by contraction or extension
muscles.
 In fact the bone in moving work
as A lever
 Levers cannot be changed, but they
can be utilized more efficiently .

3.  levers
 Definition of levers
A rigid bar that turns about an axis of rotation or a
fulcrum .
 Parts of a lever
- FulcrumAxis of rotation of the lever .
- Effort Arm The part of the lever that the effort force .
- Resistance Arm The part of thelever
that applies the resistance force .

4.  Classification of levers
 First Class Lever
A first-class lever is a lever in which the fulcrum (Axis) is located
between the input effort (Force) and the output load (Resistance).
 Second Class Lever
Resistance (load) is located between the effort arm and the
fulcrum .
 Third Class Lever
The effort force is located between the fulcrum and the resistance .

5.  The 3 Classes of
Levers
| |
ForceArm |
A
R
F
| ForceArm | | ResistanceArm |
R
| Resistance Arm |
A
|
F
A
R
| ForceArm
ResistanceArm
F
|
• FAR
1st
• ARF
2nd
• AFR
3rd

6.  1 st class of lever in human body
 The joint between the skull and the atlas vertebrae of the
spine the spine is the fulcrum across which muscles lift
the head .

7.  The joint between the hummers and radius – ulna .

8.  2 nd class of lever in human body
 The Achilles tendon, pushing or pulling across the heel of the foot.

10.  3 rd class of lever in human body
 The elbow joint: when lifting a book, the elbow joint is the
fulcrum across which the biceps muscle performs the work.

12.  Benefit from lever ?
 Increase power
 Increase distance
 Increase speed
 Transfer power from one place to another
 precision in work safety
 Avoid risks

13. EXERCISE FOR ABDOMEN IN TRANSVERSE PLANE
Transverse plane
This plane divides the body into top and bottom halves.
• Movement in the transverse plane are rotational, both internal and external.
• (Transverse plane=Rotational Movement)

14. EXERCISES:
Exercise 1.
KETTLEBELL LUNGE TWIST.
Steps:-
1. Stand with feet hip width apart and hands out in front of you.
2. Step forward with your left leg into a lunge position and twist your torso to the left.
3. Return to starting position then switch sides
4. Repeat for desired reps.

15. EXERCISE 2.
LOW LUNGE TWIST WITH REACH
STEPS:-
1.Start in a forward lunge position with
your right leg forward.
2.Drop your left knee to the ground.
3.Put your right elbow on the inside of your
right knee.
4. Push your right elbow into your right
knee than rotate your torso to the left.
5. Reach back with your left arm until you
feel a stretch in your lower back and right
groin.
6. Hold for about 20-30sec. Then slowly
release.

16. EXERCISE FOR ABDOMEN IN SAGITAL PLANE
SAGITAL PLANE:- is an imaginary line that
divides your body vertically into left and right sides.
EXERCISE FOR ABDOMEN:-
1. CRUNCHES.
- To perform crunches your starting position is on
your back with your knees bent and your feet flat on the
floor.
- place your hands on your thighs,across chest or on
your temples.
- contract your abs while exhaling, and lift your head
and shoulders off the floor. Hold the top
position for a sec. and then lower your upper body
back to the floor.

17. EXERCISE 2.
SUPINE TOE TAP
Steps:-
1. Start on your back, lift your legs, with your knees
bent to 90 degrees.place your hands at your sides,
palms down.
2. Tighten your core lower your right foot and gently tab
the floor , kneeling your left leg still and your back flat.
3. Raise your right leg to return to the starting position.
4. Repeat with your left leg.

18. THANK YOU
.BY:- GARGI SURYAVANSHI