The Catalan government has announced updated rules and guidelines relating to the ongoing pandemic.
TLDR: as of Monday 8 February, you can:

• travel within your comarca (was municipality)
• go to the gym (30%, and you have to book)
• go to lunch or breakfast at a restaurant for 1 hour more

You are not allowed to leave or enter Catalonia without good reason (e.g. work, emergency, important administrative reasons, court summons, caring for dependents, etc).
Comarcal (county, NOT municipal) lockdown from Monday 8 February - 22 February

• You may not leave your comarca (county, e.g. Barcelonès, Vallès Occidental) during this time, except for good reason (e.g. work, school, looking after dependents, medical emergency, etc). Here is a map of the comarques of Catalonia.
• This overrules the previous municipal lockdown. You are no longer limited to staying in one town/municipality.
• For anyone living in Barcelona, this means that you can travel freely between BCN, l'Hospitalet, Badalona, Sant Adrià de Besòs and Santa Coloma de Gramanet.
• You can download the updated self-declaration form here
• You can meet in groups of 6 people max, from up to 2 'bubble' groups

The daily curfew rules remain:

• Everyone should be off the streets and indoors between 2200-0600.
• Public transport schedules do not change
• You can use a "self responsibility certificate" (see above) to explain why you're breaking the rules
• Fines range from 300€ to 6,000€

Bars and restaurants:

• May open from 7.30 am to 10.30 am, and from 1.00 pm to 4.30 pm
• May open during the rest of the day, but only for takeaways
• Max 4 people per table (6 if you all live together)
• Indoors: 30% occupancy
• Terraces: 100% occupancy
• 2 meter safety distance must be observed for all customers
• Deliveries until 11pm, collect take out until 10pm

Shops, stores and other businesses:

• All non-essential shops and stores closed at weekends
• Shopping centers closed
• All stores over 400m2 closed for the full 10 days
• Hairdressers and beauty salons can open, clients need a prior appointment

Culture

• Cinemas, theaters and concert halls may open to 50% occupancy (max 500 people)
• Museums and galleries open to 50%
• Bookshops can open normally

Education

• Some university courses will now require attendance
• After-school activities remain suspended

Sport and fitness

• Outdoor sports facilities open (max 50% occupancy)
• Gyms may open to 30% occupancy. Clients will need to book in advance. Changing rooms cannot be used except for going swimming
• Competitions remain suspended
• Outdoors sports activities in groups of 6 max

Others

• Casinos, bingo halls etc remain closed
• Indoor playgrounds remain closed
• Outdoor playgrounds open until 8pm
• Religious and civil ceremonies allowed, up to 30% occupancy

Work

• Companies should encourage working from home, where possible
• Conventions, trade shows and fairs etc. are all banned

The Catalan government has just announced updated rules and guidelines for the Christmas period.

As of Monday 21 December:

You are not allowed to leave or enter Catalonia without good reason (e.g. work, emergency, important administrative reasons, court summons, caring for dependents, etc), or to visit family.
Comarca/county lockdown Monday 21 December - Monday 11 January

• You may not leave your comarca (county) during this time, except for good reason (e.g. work, school, looking after dependents, medical emergency, etc), or to visit family, or to go to a second residence or hotel or equivalent.
• Comarques la Cerdanya and el Ripollès are under confinement. No entry permitted except for business or emergency reasons.
• For anyone living in Barcelona, this means that you cannot leave the Barcelonès comarca apart from those exceptions.
• Here is a map of the comarques of Catalonia
• You can download the updated self-declaration form here
• You can meet in groups of 6 people max, with the exception of: Christmas Eve, Christmas Day, Sant Esteve (Boxing Day), New Year's Eve, New Year's Day and Reis (6 January). On these days, up to 10 people can meet, from a maximum of 2 households ('bubbles').

The daily curfew rules remain:

• Everyone should be off the streets and indoors between 2200-0600.
• Exceptions: 24 December until 1 am; 31 December until 1 am; 5 January until 11 pm.
• Public transport schedules do not change
• You can use a "self responsibility certificate" to explain why you're breaking the rules
• Fines range from 300€ to 6,000€

Bars and restaurants:

• May open from 7.30 am to 9.30 am, and from 1.00 pm to 3.30 pm
• May open from 7 pm to 10 pm, but only for takeaways
• Max 4 people per table (6 if you all live together)
• Indoors: 30% occupancy
• Terraces: 100% occupancy
• 2 meter safety distance must be observed for all customers
• Deliveries until 11pm, collect take out until 10pm

Shops, stores and other businesses:

• Smaller stores (under 800m2) can open with 30% occupancy
• Bigger stores (over 800m2) can now also open at 30%
• Shopping centers remain closed, excepting the shops that serve key needs (food, medical, etc), or which you can access directly from the street
• Hairdressers and beauty salons can open, clients need a prior appointment

Culture

• Cinemas, theaters and concert halls may open to 50% occupancy (max 500 people)
• Museums and galleries open to 50%

Education

• Schools go back on 11 January (not 8 January, as originally planned)

Sport and fitness

• Outdoor sports facilities open (max 50% occupancy)
• Gyms and sports centers open, max 30% occupancy, and clients will need to book in advance. Changing rooms cannot be used except for going swimming
• Competitions remain suspended
• Outdoors sports activities in groups of 6 max,

Others

• Casinos, bingo halls etc remain closed
• Indoor playgrounds remain closed
• Outdoor playgrounds open until 8pm
• Religious and civil ceremonies allowed, up to 30% occupancy

Work

• Companies should encourage working from home, where possible
• Conventions, trade shows and fairs etc. are all banned