ASICS Novablast 5 Review: First Impression
Some shoes take weeks to evaluate. The ASICS Novablast 5 didn't. On the very first stride I felt something different: that soft but stable feel that rarely coexists in the same pair of shoes.
I've been using it as my go-to for daily training runs — those 45-70 minute sessions that make up the bulk of weekly volume and where, if you're not careful, overuse injuries quietly accumulate.
This isn't an unboxing. It's an honest analysis of why the Novablast 5 has become my essential daily trainer, backed by its technical specs and what the science says about cushioning and joint health.
ASICS Novablast 5: Specs and FF Blast MAX Technology
The Foam That Changes Everything
The jump from v4 to v5 is the biggest in the series. ASICS replaced the FF Blast+ Eco with the new FF Blast MAX, a polyolefin foam with no EVA that is approximately twice as soft as the Novablast 3 and 50% softer than the v4, with 8.5% more rebound according to the brand's lab data.
In practical terms: more energy returned with each stride and less accumulated fatigue. It's not a dead shoe — it has response. But that response doesn't come at the cost of your joints absorbing the impact.
Technical Specifications
| Feature | Novablast 5 |
|---|---|
| Stack heel / forefoot | 41.5 mm / 33.5 mm |
| Drop | 8 mm |
| Weight (US 10) | 251 g |
| vs. v4 | 16 g lighter |
| Outsole | AHAR LO |
A 41.5 mm heel stack is substantial. It's in the same cushioning category as shoes designed for ultramarathons, but with a weight and responsiveness that make it viable for daily training without feeling like you're running on stilts.
Fit and Upper
Good lockdown without excessive pressure on the metatarsals or instep. The padded tongue and new Jacquard mesh mean the foot doesn't feel pressure points on longer runs. The AHAR LO outsole improves grip compared to previous versions — noticeable on wet asphalt.
Cushioning and Joint Health: What the Science Says
This isn't just subjective feel. The scientific evidence on high-cushion footwear is clear on several key points.
A study published in PMC (2023) with runners across ability levels showed that high-cushion shoes improve performance in incremental tests by around 5.7% and reduce submaximal oxygen cost by 3.2%. Less effort to hold the same pace.
For the everyday runner: cushioning reduces training-related muscle soreness. Volume runs in well-cushioned shoes allow you to absorb higher training loads without the DOMS or inflammation that compromises subsequent sessions.
On the Achilles tendon: research suggests that shoes with 8 mm drop and medium-high cushioning reduce mechanical load on the tendon under acute loading. What I notice in practice with the Novablast 5:
- ✔ Less tension in soleus and calves
- ✔ No jarring impact in the shins
- ✔ Long runs with fewer overuse symptoms
- ✔ Faster recovery between sessions
Who Is the ASICS Novablast 5 For?
The Novablast 5 is a training shoe, not a performance shoe. That distinction matters before you buy it.
If you're looking to do intervals, tempo runs, or any demanding pace work, this shoe will fall short. The foam is too soft to efficiently transfer force at high speeds. There are better tools for that.
But if your goal is to accumulate volume without beating up your legs — which is exactly what 80% of any smart runner's training consists of — the Novablast 5 does that job better than most of what's on the market.
Ideal profile for the ASICS Novablast 5:
- Recreational or advanced runner training 3-5 days per week
- History of Achilles tendon, calf, or shin discomfort
- Weekly volumes of 40-80 km where recovery matters
- Looking for real comfort, not just foam marketing
Gear Doesn't Make the Runner — But It Can Help the Runner Last Longer
The best equipment doesn't replace smart training. But choosing the wrong tools has a real cost: overuse injuries, inadequate recovery, and lost mileage.
The Novablast 5 won't make you faster. But it can mean you arrive on Tuesday with fresher legs than you had on Monday. And over months of accumulated training, that's where real performance is built.
Sources
- PMC/NIH (2023). Highly Cushioned Shoes Improve Running Performance and Running Economy. pmc.ncbi.nlm.nih.gov/articles/PMC8920011
- PMC/NIH (2024). Persistent Improvements in Running Economy With Advanced Footwear Technology. pmc.ncbi.nlm.nih.gov/articles/PMC12464892
- Frontiers in Sports and Active Living (2022). Running Injury Paradigms and Footwear Design Features. frontiersin.org
- RunRepeat (2025). ASICS Novablast 5 Review. runrepeat.com/asics-novablast-5
- ALS Sport (2025). ASICS Novablast 4 vs 5 Comparison. alssport.es