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.
Secondary Muscles. The side plank also works several other muscles that provide additional stability as you hold the position. These muscles include the gluteus maximus, the quadriceps on the front of your thighs and the hamstrings on the back of your thighs.he side plank also works several other muscles that provide additional stability as you hold the position. These muscles include the gluteus maximus, the quadriceps on the front of your thighs and the hamstrings on the back of your thighs.