Duration: 1h3m| Video: .MP4 640x480, 30 fps(r) | Audio: AAC, 48000 Hz, 2ch | Size: 608 MB Genre: eLearning | Language: English + .srt + .vtt A strong, healthy back is essential to your well-being and vitality. Through our often sedentary day-to-day activities - sitting at a computer, driving