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.
Moving down your midsection, successful plank exercises actually develop the muscles in your butt! These muscles tend to be ignored by a lot of exercises, so this is another great benefit of plank exercises. In much the same way as you develop your biceps and arm muscles, holding the planking position helps develop the muscles in your thighs too.