Back injuries are one of the common injuries seen in fast bowlers, involving intervertebral disk, facet joints, pars interarticularis and the soft tissues. Lumbar bone stress injuries (LBSIs) are a leading cause of injury-related time loss and medical costs in elite-level men’s cricket, with young fast bowlers at highest risk. Despite a relatively low annual incidence (4.9 per 100 fast bowlers each season), lumbar stress fractures account for 3.2% of young fast bowlers being unavailable for training on any given day, with rehabilitation often delaying return-to-play (RTP) by 6–12 months. Moreover, in recent past we have seen so many world class fast bowlers missing out due to this type of injury.

Bone stress injuries develop along a continuum, progressing from stress reaction, bone marrow oedema (BMO) without fracture to incomplete and then complete stress fractures. There is wide consensus that a particular bowling action serves as a major risk factor for this injury. Numerous studies have found that mixed action has a strong association with the lumbar vertebral stress injuries. In a study, 89% of players diagnosed with LBSI had a mixed action. In the mixed type, the exact technique can vary as it is a combination of both the front-on and side-on bowling actions.  At the back foot contact, the hips and lower limb may adopt a side on orientation whereas the shoulders face front-on to the batsman.

Conservative treatment is indicated in case of acute fractures which have potential to heal. It includes complete cessation of sporting and impact activities for 3 months. A standard recommendation of full time wearing (usually more than 20 hours per day) of brace for 3 months is recommended. Systematic physical rehabilitation program can be started along with bracing. This primarily involves anti lordotic exercises, abdominal strengthening exercises and hamstring stretches. Operative treatment is indicated in patients with failed conservative treatment for 6 months or chronic pars defects at presentation having no potential signs of healing.

MRI is increasingly used in elite cricket to screen high-risk fast bowlers for pre-symptomatic LBSI, aiming to support earlier detection and prevent progression to more severe injury. Targeted MRI screening detected LBSIs at earlier stages in young elite male fast bowlers, supporting conservative management (100% RTP success) and significantly shorter recovery times. Scheduling MRI screening post season allows injuries to be addressed during natural recovery windows, and optimizing in-season availability without compromising competitive progression.