Gross Motor Delays: What They Are and Why They Matter
Lily Baiser
MS, OTR/L · Chief Clinical Officer, Kinspire · Licensed pediatric occupational therapist and Kinspire co-founder · Full bio →
· 7 min read
There's a particular kind of worry that comes from watching other children run and climb and jump while your child hangs back, falls more, or moves in a way that looks effortful. You tell yourself every child develops differently. You tell yourself not to compare. But you keep watching, and something keeps nagging at you. If that's where you are right now, trust that feeling. Gross motor development is foundational to far more than athletics — and when it's delayed, it matters in ways that reach into every corner of a child's day.
Movement isn't just about sports. It's about exploring the world, building confidence, and learning how your body works in space.
What Are Gross Motor Skills?
Gross motor skills involve the large muscle groups of the body — the legs, arms, trunk, and core — and the coordination, strength, balance, and body awareness that allow a child to move through the world. These are the skills behind walking, running, jumping, climbing, catching a ball, riding a bike, and navigating stairs.
Gross motor development follows a highly predictable sequence. Most infants roll by 4–5 months, sit independently by 6–8 months, pull to standing by 9–10 months, and walk by 12–15 months. Toddlers and preschoolers progressively develop the ability to run, jump, kick a ball, hop on one foot, gallop, and skip. By age 5–6, children are typically coordinated enough for basic sports activities and sustained physical play.
A gross motor delay means a child is significantly behind this trajectory in one or more of these skills.
The Components of Gross Motor Function
Core systems
- →Muscle strength: Core strength — the muscles of the trunk and abdomen — is particularly foundational, providing the stable base from which limb movement originates.
- →Balance and equilibrium: Both static balance (holding still on one foot) and dynamic balance (maintaining balance while moving) are critical to everything from walking on uneven ground to learning to ride a bike.
- →Coordination: The ability to sequence and time movements across the body, including bilateral coordination and cross-lateral coordination (movements that cross the midline, like crawling and galloping).
- →Body awareness (proprioception): The internal sense of where the body is in space. Children with poor body awareness may appear clumsy, crash into things, fall frequently, or use excessive force in physical interactions.
- →Vestibular processing: The inner-ear system that registers movement and gravity, contributing to balance, spatial orientation, and tolerance for movement experiences.
Gross motor delays can reflect weakness in any or several of these systems, which is why a thorough evaluation looks beyond "can they walk" to understand what's actually driving the difficulty.
How Gross Motor Delays Show Up in Daily Life
By age
- →Infants and toddlers: Late to roll, sit, pull to stand, or walk; low muscle tone (a "floppy" quality); preference for being carried over crawling or walking; unusual crawling patterns; frequent falling.
- →Preschool age: Difficulty learning to jump with both feet off the ground; trouble navigating stairs with alternating feet; avoidance of climbing structures or tricycles; falls or trips significantly more than peers.
- →School age: Struggles with organized sports or PE; difficulty learning to ride a bike; poor throwing, catching, or kicking; avoidance of physical play; low endurance or early fatigue.
Gross Motor Delays and Social Life
Physical play is one of the primary ways children connect with peers, especially in elementary school. A child who can't keep up at recess — who can't catch a ball, run without tripping, or climb what others are climbing — often withdraws from physical play altogether. This social withdrawal can compound into loneliness and lowered self-esteem in ways that outlast the motor delay itself.
What Causes Gross Motor Delays?
Common contributors
- →Low muscle tone (hypotonia): One of the most common findings — the resting tension of the muscles is lower than typical, resulting in reduced strength and endurance. It can be associated with genetic conditions or neurological differences, or it can be idiopathic.
- →Developmental Coordination Disorder (DCD): The most common cause of motor coordination difficulties in school-age children, affecting approximately 5–6% of children.
- →Premature birth: Even "late preterm" babies (born 34–37 weeks) show higher rates of motor delays than full-term peers.
- →Neurological conditions: Cerebral palsy, spina bifida, and other conditions that affect motor pathways produce gross motor delays of varying severity.
- →Autism and ADHD: Both conditions are associated with higher rates of gross motor difficulty, often related to motor planning, coordination, and body awareness challenges.
When to Seek an Evaluation
The most relevant evaluators for gross motor concerns are a physical therapist (PT), occupational therapist (OT), or developmental pediatrician. You can seek evaluation through Early Intervention (under age 3), your local school district (age 3+), or through private PT or OT. Your pediatrician can provide referrals, but you can also self-refer to Early Intervention.
How Kinspire Helps
Build challenge into daily movement — without the shame
Gross motor delays are uniquely well-suited to home-based support because so much of gross motor development happens through daily movement — active play, outdoor exploration, climbing, running, and physical challenge. Kinspire's OT coaches help parents understand their child's gross motor profile, what's achievable now, and how to build physical challenge into daily play in a way that builds skill and confidence without adding to the shame that children with motor delays often carry.
Full Motor Profile
Understand strength, balance, vestibular needs, and endurance — not just whether they can walk.
Challenge Built Into Play
Embed physical practice into outdoor time, playgrounds, and daily routines instead of running drills.
Confidence Without Shame
Meet your child's body where it is and grow skill without reinforcing "I'm bad at this."
Start for free. Grow from there.
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Questions Parents Are Actually Asking
My child skipped crawling and went straight to walking. Should I be worried?+
Crawling builds upper body strength, bilateral coordination, and the cross-lateral movement patterns that later support reading and writing. Skipping crawling is associated with higher rates of developmental difficulties in some studies, though many children who skip it develop typically. Mention it to your pediatrician, especially if you have other concerns.
My child's PE teacher says they're clumsy and uncoordinated. Is that just a personality trait?+
No. Clumsiness is a motor characteristic, not a personality trait, and persistent, significant clumsiness in a school-age child warrants evaluation. It may be a sign of DCD, proprioceptive processing differences, or another identifiable issue that responds to targeted intervention.
At what age is it normal for kids to ride a bike without training wheels?+
Most children learn between ages 4 and 7, with significant variation. Balance bikes can accelerate the learning process. If your child is approaching age 7–8 and struggling significantly despite practice and interest, raise it with a PT or OT as part of a broader motor assessment.