Usual care

Participants will breathe against a load ≥ 50% of their baseline MIP, after which loads will increase according to the participant's tolerance across the remaining training period, using a Borg scale rating of 4 to 6 on perceived exertion as an indicator of adequate training intensity.

Intervention: Inspiratory Muscle training (12-weeks)

Participants will load ≥ 50% of their maximum muscle force (Kg), after which load will increase according to the participant's tolerance across the remaining training period, using a Borg scale rating of 4 to 6 on perceived exertion as an indicator of adequate training intensity.

Intervention: Peripheral muscle training (12-weeks)

Supervised interval-based program consisting of seven cycles of 2-minutes work and 1-minute rest. This protocol is published as a practical guide for clinicians by Hill et al (2010).

The sessions will take place 3 times per week over a twelve-week period for a total of 36 sessions. All participants will be familiarized with the breathing exercises over a two-week familiarization period at the beginning of the protocol. The load will be adjusted at ≥ 50% of baseline MIP. Participants remain seated in groups of 8 to 10.

Bioimpedance analysis (BIA) estimates the volume of fat and lean body mass. The test itself is inexpensive, easy to use, readily reproducible and appropriate for both ambulatory and bedridden patients. Reference: J Aging Phys Act 2015;23(4):597-606. Korean J Intern Med 2016;31:643-650.

MIP and MEP are probably the most frequently reported non-invasive estimates of respiratory muscle strength. Ever since Black and Hyatt (1969) reported this technique it has been widely used in patients, healthy control subjects across all ages, and athletes. Pressure is recorded at the mouth during a quasi-static short (few seconds) maximal breathing. Reference: Am J Respir Crit Care Med. 2002;166:531-535.

Isometric hand grip strength is strongly related with lower extremity muscle power, knee extension torque and calf cross-sectional muscle area. In practice, there is also a linear relationship between baseline handgrip strength and incident disability for activities of daily living. Reference: Age and Aging. 2010;39:412-423.

Maximal isometric muscle strength (Kg) was assessed for knee extension (Quadriceps femoris) and elbow flexion (Biceps brachii). Reference: J Am Geriatr Soc 2002; 50: 461-7.

This ventilatory test is a non-invasive technique and is a measure of both inspiratory and expiratory muscle endurance. The MVV is the largest volume that can be breathed in and out of the lungs during a 12 -15 second interval with maximal voluntary effort. Reference: Am J Respir Crit Care Med. 2002;166:562-564.

Number of falls and resulting fractures will be checked from the medical history of participants.