Daily backpacker budget: $20 ~ $35. Bolivia is the ultimate cheapie of South America. Things may be very basic here as itâs a dirt poor country but your dollars sure go a long way. It is the cheapest country for accommodation and the cheapest for food and drink as well.
The plank strengthens the abdominals, back, and shoulders. Muscles involved in the front plank include: 1  Primary muscles: erector spinae, rectus abdominis (abs), and transverse abdominus.he plank strengthens the abdominals, back, and shoulders. Muscles involved in the front plank include: 1  Primary muscles: erector spinae, rectus abdominis (abs), and transverse abdominus.
How to do the Plank Exercise. According to the American Council on Exercise, the plank exercise is one of the top ten abdominal exercises. This exercise is a great way to flatten your stomach, strengthen your core and improve the endurance of your back and stomach muscles. By strengthening your core, you will strengthen your hips and pelvic floor. Having a strong core, stomach and back muscles will lead to improved posture and may help prevent injuries.