Aelastic

17/10/2026

Think about how a wheel spins.

A small wheel turns fast.
A big wheel turns slow.

That's not a preference.
That's physics.

The length of the lever determines
how quickly it can rotate.

Your stride works the same way.

The wheel is your leg.
The lever is the distance
from your hip to your foot.

When the leg swings under your body,
the lever is short.

It rotates quickly.
The next step arrives faster.

That's the compact wheel.

When the leg reaches out in front of you,
the lever is long.

It rotates slowly.
And while it's still swinging through,
you've already lost momentum.

That's the dragging oval.

Same runner.
Same effort.
Completely different speed.

Now here's the part most runners get wrong.

They think stride length is about how far they can reach.
Bigger stride, more distance covered, faster runner.

But that's backwards.

A long reach doesn't cover more ground.
It delays the next step.

The foot lands further ahead,
so it takes longer for the body to pass over it
before you can push off again.

You haven't gained distance.
You've just slowed the wheel.

That's why the fastest runners
don't look like they're reaching.

They look like they're spinning.
Short lever, fast rotation, quick turnover.

The next step arrives before
the last one has even finished.

That's not a longer stride.
That's a faster wheel.

And the fix isn't to try harder.

It's to shorten the lever.

Land under your body, not out in front.
Keep the foot close to your hip line.

The wheel spins faster when the lever is short.

Spin wheels.
Don't drag ovals.

Look at the body as a system.
Start at the base.
Work your way up.

I'll keep breaking this down in future posts
if you want to follow along.


⚙️

17/09/2026

aeLASTIC e passa la paura 😂

Per molti anni il mondo del fitness ci ha diviso in due tribù: quelli del cardio e quelli della sala pesi. Come se fossero due sistemi separati.

Non lo sono.

Il VO2max, il miglior indicatore di forma cardiovascolare che abbiamo, e uno dei predittori più forti di mortalità in medicina, non dipende solo da cuore e polmoni. Dipende da tre sistemi insieme: i polmoni che assorbono ossigeno, il cuore e i vasi che lo distribuiscono, e i muscoli con i loro mitocondri che lo utilizzano.

Quella terza componente è tessuto muscolare. La densità mitocondriale determina quanto ossigeno il tuo corpo riesce davvero a usare. Allenare la forza non è separato dal tuo “numero di cardio”. Ne è parte costitutiva.

Dov’è il limite, allora?

Troppo cardio diventa un problema quando il volume cronico inizia a sopprimere i segnali di crescita muscolare (il cosiddetto “interference effect”). Troppa sala pesi diventa un problema quando toglie spazio allo stimolo cardiovascolare che costruisce capillari, mitocondri e capacità del cuore.

Nessuno dei due estremi vince. Il corpo non funziona a compartimenti separati come la nostra cultura del fitness.

A 56 anni, il mio programma include ancora lavoro aerobico di base, intervalli VO2max strutturati e un programma di forza completo, perché togliere anche solo uno di questi pezzi non mi costa solo un numero su un test. Mi costa parte del sistema fisiologico da cui quel numero dipende.

E c’è un quarto pilastro di cui quasi nessuno parla: mobilità e flessibilità. Forza e capacità cardiovascolare contano poco se perdi il raggio di movimento per usarle.

Smettiamo di oscillare tra “tutto cardio” e “tutto muscolo”. Alleniamo tutto, sempre. Il corpo non è mai stato costruito a compartimenti stagni.

31/07/2026

aeLASTIC
Dal 2018 al servizio dello sport e del firness

03/07/2026

Una nuova puntata del programma Bellezza e potere, in onda su Umbri...

26/04/2026

Crouch gait represents a breakdown of normal biomechanical efficiency
correction is needed

Crouch Gait – The Biomechanics Behind a Collapsed Posture

Crouch gait is a pathological gait pattern characterized by excessive flexion at the hip and knee combined with increased ankle dorsiflexion, resulting in a lowered center of mass and reduced postural height throughout the stance phase. Biomechanically, this posture reflects a failure of the lower limb to achieve extension during weight acceptance and midstance, which fundamentally alters force transmission, joint loading, and muscular demand across the entire kinetic chain.
At initial contact and loading response, instead of transitioning toward extension, the limb remains flexed, causing the ground reaction force (GRF) vector to pass posterior to the knee joint, creating a persistent external knee flexion moment. This forces the quadriceps to work continuously and excessively to prevent collapse, leading to high energy expenditure and early fatigue. Simultaneously, the hip remains flexed due to weak hip extensors (especially gluteus maximus) and/or tight hip flexors, preventing efficient forward propulsion and contributing to trunk compensation such as forward lean.
At the ankle, excessive dorsiflexion is commonly seen, often due to soleus weakness or lengthened plantarflexors, which reduces the ability to generate an effective plantarflexion moment during push-off. This eliminates the normal “ankle rocker to forefoot rocker” progression, further compromising forward propulsion. Instead of acting as a rigid lever during terminal stance, the foot remains relatively compliant, reducing efficiency.
Muscle imbalance is central to crouch gait. There is typically hamstring overactivity or tightness, which maintains knee flexion, combined with insufficient strength or control from the quadriceps and plantarflexors. In conditions like spastic diplegic cerebral palsy, neural factors amplify these imbalances, but similar mechanics can also be seen in weakness-driven or compensation-based crouch patterns in other populations.
The trunk also plays a compensatory role. Forward trunk inclination is often adopted to shift the center of mass anteriorly, attempting to bring the GRF closer to the knee joint to reduce quadriceps demand. However, this compensation increases load on the hip extensors and spinal musculature, creating a cascade of inefficiencies.
Energetically, crouch gait is highly inefficient. The constant need for active muscular stabilization instead of passive skeletal alignment increases metabolic cost significantly compared to normal gait. The absence of effective elastic energy utilization—particularly at the ankle—means that propulsion relies heavily on active muscle work rather than stored energy return.
Over time, this abnormal loading pattern leads to secondary complications such as joint degeneration, patellofemoral pain, ligament strain, and progressive deformity. The knee joint, in particular, is subjected to sustained compressive and shear forces due to prolonged flexion under load.
In essence, crouch gait represents a breakdown of normal biomechanical efficiency where the body loses its ability to utilize extension, leverage, and elastic recoil, forcing muscles to compensate continuously. It is not just a positional issue, but a complex interaction of muscle imbalance, altered joint moments, and inefficient force mechanics that affects the entire movement system.

24/04/2026

A qualsiasi età si puó recuperare, anche in parte, la mobilità e la stabilità del piede. Un lavoro in catena cinetica per ridurre le tensioni anche al tratto cervicale. Con Aelastic si puó

SUBTALAR JOINT CONTROL: INVERSION, EVERSION & THE KEY TO FOOT STABILITY

The image illustrates one of the most important yet underestimated components of lower limb biomechanics—the subtalar joint (STJ) and its role in controlling inversion, eversion, and neutral alignment. Located between the talus and calcaneus, this joint acts as a mechanical adaptor between the leg and the ground, allowing the body to respond efficiently to different surfaces and loads.

In a neutral position (0°), the calcaneus is aligned vertically under the tibia, allowing optimal load transfer through the ankle and foot. This position represents a balanced state where neither excessive pronation nor supination dominates. It is biomechanically efficient because forces are distributed evenly across the joints, ligaments, and soft tissues.

During inversion (approximately up to 20°), the calcaneus tilts inward relative to the tibia. This movement is associated with supination, where the foot becomes more rigid. Biomechanically, this rigidity is essential during the push-off phase of gait, as it creates a stable lever for propulsion. However, excessive inversion increases stress on the lateral ankle ligaments and raises the risk of ankle sprains.

In contrast, eversion (typically around 5°) represents outward tilting of the calcaneus and is a key component of pronation. This motion allows the foot to become more flexible, helping absorb shock during initial ground contact. While this adaptability is crucial, excessive eversion leads to overpronation, which can alter the alignment of the entire kinetic chain, contributing to tibial internal rotation, knee valgus, and even hip dysfunction.

From a biomechanical standpoint, the subtalar joint does not work in isolation. Its motion directly influences—and is influenced by—the tibia, knee, and hip. For example, excessive eversion can drive internal rotation of the tibia, which then affects knee mechanics and patellofemoral tracking. Similarly, restricted inversion may reduce the foot’s ability to form a rigid lever, compromising gait efficiency.

The relatively smaller range of eversion compared to inversion highlights an important concept: the body is designed to allow controlled shock absorption but relies heavily on stability for propulsion. This asymmetry ensures that while the foot can adapt to the ground, it can also transition into a stable structure when needed.

Clinically, assessing inversion, eversion, and neutral alignment provides valuable insight into rearfoot mechanics, injury risk, and movement efficiency. Deviations from neutral—whether toward excessive inversion or eversion—often reflect deeper issues such as muscular imbalances, ligament laxity, or poor neuromuscular control.

In essence, the subtalar joint acts as a biomechanical switch—shifting the foot between mobility and stability.

21/03/2026

https://youtu.be/7ukd4v_sQIs?is=rspdtoYE5MtnmZxN

Una nuova puntata del programma Bellezza e potere, in onda su UmbriaTV, giunto alla decima edizione . Ideato da Franco Parlavecchio, web marketing Alberto S...

21/03/2026

Una nuova puntata del programma Bellezza e potere, in onda su UmbriaTV, giunto alla decima edizione . Ideato da Franco Parlavecchio, web marketing Alberto S...

16/03/2026