Bending at the waist places excessive strain on the lower back.
Reaching forward or over your head extends the center of gravity, increasing load on the back and shoulders.
Standing up straight is not an awkward position in itself, but rather a posture to maintain during lifting.
Therefore, the correct answer is that both bending at the waist and reaching forward or over your head are awkward positions: D .
Explanation
Analyzing the Options We need to identify the awkward lifting positions that can lead to injury. Let's analyze each option:
A. When you bend at the waist: Bending at the waist while lifting puts a lot of strain on your lower back, making it a risky position.
B. When you stand up straight: Standing up straight is generally a good posture, but it doesn't describe the lifting action itself. It's more about maintaining a straight back during the lift, not an awkward position.
C. When you reach forward or over your head: Reaching forward or over your head extends your center of gravity and increases the load on your back and shoulders, making it an awkward and potentially dangerous position.
D. Both A and C are correct: Based on our analysis, both bending at the waist and reaching forward/over your head are awkward positions.
E. All of the above are correct: Since B is not an awkward position, this option is incorrect.
Determining the Correct Answer Based on the analysis, bending at the waist (A) and reaching forward or over your head (C) are awkward lifting positions that can increase the risk of injury. Therefore, the correct answer is D.
Final Answer The correct answer is D.
Examples
Understanding proper lifting techniques is crucial in many everyday scenarios. For example, when picking up groceries, it's important to bend your knees and keep your back straight to avoid straining your back. Similarly, when placing items on a high shelf, using a step stool to avoid reaching overhead can prevent shoulder injuries. Applying these principles helps maintain a healthy posture and reduces the risk of musculoskeletal injuries in daily activities.
The correct answer is D, which states that both bending at the waist and reaching forward or over your head are awkward positions that can lead to injury when lifting. Standing up straight is not an awkward position and should be maintained while lifting. Therefore, Options A and C correctly identify risky lifting postures.
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