There are few better places to while away a lazy Sunday morning than a spa.

Better still, the spa facilities of Glasgow's only five-star hotel: the Blythswood.

The opulence and grandeur strikes you as soon as you walk through the doors of this category B listed property - formerly the home of the RAC Club - into a scented marble lobby where guests can relax in its green velvet seating nooks.

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In the evenings - between 5-6pm - the lobby hosts a complimentary social hour for visitors, where free wine and beer are served. It's a nice touch.

On this occasion though, I was heading into the basement - where the spa and thermal suite are located - to try out its Ishga Detox Body Wrap.

The 55-minute treatment is part of the spa's new curated wellness experiences under the banner 'Relax-Detox-Invigorate-Recover'.

The main entrance lobby at the Blythswood hotel in GlasgowThe main entrance lobby at the Blythswood hotel in Glasgow (Image: Kimpton) In addition to the therapies - designed to induce a range of different outcomes from energy boost ("invigorate") to mindfulness ("recover") - clients who use the thermal suite prior to their treatment are given a card advising which 'route' to take through the spa's different experiences, each of which is named after a different Hebridean island.

In my case, for Detox, I started with Erraid (the tepidarium with its warm marble loungers designed to soothe aching muscles) and ended at Pabay (the steam room).

The thermal suite reopened last summer after a major renovation.

The downside might be its popularity.

A Sunday morning is probably peak time for guests making the most of it before they depart, and weekend visitors passing through prior to treatments.

As a comparatively small facility, it gets busy - and fairly noisy - easily, which inevitably detracts somewhat from the relaxation.

The exterior of the Bythswood hotel in Glasgow, overlooking the manicured gardens of Blythswood SquareThe exterior of the Bythswood hotel in Glasgow, overlooking the manicured gardens of Blythswood Square (Image: Kimpton) There is also virtually no chance of securing one of the few daybeds on offer (they were all 'claimed' Benidorm-style in the form of discarded towels by the time I arrived at 9.30am) and there are hints of wear and tear: I overheard other guests complaining of broken lockers and faulty shampoo dispensers in the showers.

If there is an optimum time to visit the Blythswood's thermal suite it is probably first thing on a weekday morning - maybe a Tuesday or Wednesday - when demand is lowest, and its secluded luxury can be best appreciated.

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On the plus side, when it comes to the treatment experience, it is definitely five-star.

My therapist, Pamela, had the kind of warm and gentle demeanour that puts you instantly at ease.

The treatment room was cosy and I settled down onto the heated bed for the first step: a foot cleanse, followed by the application of a salt scrub to my legs, arms, back and chest to buff away dry skin.

A typical treatment room at Blythswood hotel spaA typical treatment room at Blythswood hotel spa (Image: Kimpton) The treatment uses organic Ishga products made with antioxidant-rich Hebridean seaweed.

This was followed by the application of a warm, algae-rich "detoxifying" mud which was spread all over my limbs, back and chest, before I was cocooned in towels while it soaked in (apparently it helps to reduce cellulite).

The highlight of the treatment is definitely the scalp massage, which promises to "stimulate the lymphatic system".

I've no idea whether it did or not, but it was certainly blissfully relaxing.

Once this was over, it was time to shower off the mud (the shower cubicle is located within the treatment room), after which I was massaged in warm body oil.

The end result: silky soft skin, and a general sense of wellbeing.

Was I detoxed? Who knows - but I was definitely unwound.

The Ishga Detox Body Wrap at Blythswood is available from £99