EditorialAs our population ages, finding effective interventions to treat balance impairments is critical. In the United States Medicare spent over $31 billion in 2015 managing fall injuries. More than 800,000 people a year were hospitalized because of a fall, most often a fractured hip or head injury. Fall injuries are among the top 20 most expensive medical conditions, with an average cost of over $30,000. Furthermore, these direct costs do not account for the long-term effects of these injuries such as disability, dependence on others, lost time from work and household duties, and reduced quality of life [1]. Thus, determining effective means of preventing falls is a significant health care need.There have been a large number of investigations examining various aspects related to balance training and fall prevention, with more than 50 systematic reviews and meta-analyses of this research completed since 2009 [2]. Multiple types of balance interventions have been studied, with populations of varied ages as well as with differing disabilities, and in multiple types of settings [2,3]. However, there is no simple answer about the "best" exercise prescription to prevent falls because the construct of balance itself is so complicated [4]. The ability to maintain the center of mass within the base of support, or balance is a composite impairment that is influenced by strength, flexibility, sensation, cognition, and motor control.Despite the complexity, however, developing evidence based guidelines for effective balance exercise prescription is essential. Physical therapy exercise prescription typically follows the FITT principle [5], referring to frequency, intensity, type, and time, similar to medication administration. For example, when prescribing a drug, a physician determines the correct medication [TYPE] as well as the amount [INTENSITY] and frequency [FREQUENCY] of taking the medication, and the duration to continue taking the medication [TIME]. The physical therapy profession has taken a harder look at how we prescribe exercise over the last decade across multiple domains of practice, from acute care, to orthopedics to geriatric rehabilitation [6][7][8]. Similar to pharmacological interventions, incorrect exercise dosage can be ineffective in targeting the problem, and therefore costly in actual dollars and/or time. In addition, it can be damaging [9].Because balance is a multifactorial construct, exercise prescription is complex. It is for this reason that many individuals will do better with an exercise program customized by a physical therapist rather than attending a standardized group program [10,11]. There are often multiple types of exercise necessary to address different components of the balance problem. For example, it is common to use strengthening exercises in conjunction with exercises addressing motor control components of balance, such as seen in the widely used OTAGO exercise protocol [12]. We do have guidelines for determining types of exercise, based on an individualized evaluation [2], ...