Has Qi Gong A Scientific Explanation?

Among one of the mysterious art form practised over thousand of years by the chinese is Qi Gong.

Qi Gong is well described in the Wikipedia:
Qigong, chi kung, or chi gung (simplified Chinese: 气功; traditional Chinese: 氣功; pinyin: qìgōng; Wade–Giles: chi⁴ gong¹; literally "Life Energy Cultivation") is a practice of aligning breath, movement, and awareness for exercise, healing, and meditation. With roots in Chinese medicine, martial arts, and philosophy, qigong is traditionally viewed as a practice to cultivate and balance qi (chi) or what has been translated as "intrinsic life energy". It is generally accepted that Qigong exercises have three components: a posture (whether moving or stationary) 調身, breathing techniques 調息, and mental focus on guiding qi through the body 調心. The prerequisite is a calm relaxing state of mind. Qigong is now practiced throughout China and worldwide, and is considered by some to be exercise, and by others to be a type of alternative medicine or meditative practice. From a philosophical perspective qigong is believed to help develop human potential, allow access to higher realms of awareness, and awaken one's "true nature".

Martial arts training

The practice of qigong is an important component in both internal and external style Chinese martial arts. Focus on qi is considered to be a source of power as well as the foundation of the internal style of martial arts (Neijia). T'ai chi ch'uan, Xing yi, and Baguazhang are representative of the types of Chinese martial arts that rely on the concept of qi as the foundation. Extraordinary feats of martial arts prowess, such as the ability to withstand heavy strikes (Iron Shirt, 鐵衫) and the ability to break hard objects (Iron Palm, 铁掌) are abilities attributed to qigong training.

Take a look at the National Geographic investigation into the nature of Qi Gong with science and technology measuring tools.